CSAT Practice: Blood Relations - 2 - UPSC MCQ

The man in the photograph is son of Anjali's grandfather's son i.e., the son of Anjali's father. Hence, the boy is the brother of Anjali.

Father of Deepak's daughter's father → Deepak's father.

Hence, the person in the brother of Deepak's father.

Therefore, the person is the uncle of Deepak.

P is the mother of K

K is the sister of D

D is the father of J.

Therefore, J is the nephew or niece of K and P is the grandmother of J.

As the sex of Q is not known, hence, data is inadequate.

P @ Q → P is the wife of Q ...(1)

Q $ T → Q is the brother of T ...(2)

T # U → T is the daughter of U

Hence, → Q is the son of U ...(3)

U * W → U is the father of W.

From (1) and (3), U is the father-in-law of P.

The man is the only son of the mother of the woman. Hence, the man is the maternal uncle of the woman. So, the woman is the niece of the man.

Nalni is the daughter of the only son of Gopi's grandfather. Hence, it's clear that Nalni is the sister of Gopi.

Since E is the brother of B

Therefore, A is the father of E

but D is the wife of E.

Hence, D is the daughter-in-law of A.

Brother of person's wife → brother-in-law of the person. Hence, the son of lady's brother is brother-in-law of the person.

Therefore, the brother of the lady is the father-in-law of the person. Hence, the lady is the sister of the person's father-in-law.

F3M → F is the wife of M

M5K → M is the father of K

Therefore, F is the mother of K.

Q $ R → Q is the father of R

R @ T → R is the brother of T

Hence, → Q is the father of T

T * M → T is the daughter of M

Hence, → M is the mother of T

Hence, M is the wife of Q.

Correct Answer:- d

Explanation: A $ B → A is the brother of B

B * C → B is the son of C

Hence, → A is the son of C

C @ D → C is the wife of D

Hence, → C is the mother of A.

The girl is the daughter of the sister of Sandeep's father. Hence, the girl is the cousin or Sandeep is the cousin of the girl.

The boy in the photograph is the only son of Reena's grandfather's only son; i.e., the boy is the only son of Reena's father.

Hence, the boy is the brother of Reena or Reena is the sister of the boy.

The correct option is Option D.

In either of the three cases the sex of M is not clear that is “M” may be male or female. So Option D is the correct option

P % Q → P is the mother of Q

Q + R → Q is the father of R

R - T → R is the brother of T

Hence, → Q is the father of T

T x K → T is the daughter of K

Hence, → Q is the husband of K.

Therefore, P is the mother-in-law of K.

K + Y → K is the brother of Y

Y x I → Y is the father of I

Hence, → K is the uncle of I

and I - Z → I is the sister of Z

Hence, → I is the niece of K.

Only the child of my father means 'Abhisek' himself. This means the girl is the daughter od Abhisek. Hence, Abhisek's wife is the mother of the girl.

Let's check one by one

-option A
P ∗ Q # M $ N
means P is the sister of Q, who is the mother of M, who is the father of N
i.e. Q is the mother of M and grandmother of N. P is the sister of grandmother of N.

-option B
P @ Q $ M # N
means Q is the husband of P, who is the father of M, who is the mother of N.
P is the father of M and grandfather of N. But Q cannot be P's husband. So, wrong conclusion.

-option C:
P # Q $ N ∗ M  
means P is the mother of Q, who is the father of N, who is the sister of M.
Q has 2 kids: N and M.
P is Q's mother and hence, N's grandmother.

-So, none of the option

Give the relation that N is the grandmother of P.

Anupam's son-in-law is the brother of the lady who was sitting in the car. Hence, the husband is also the son-in-law of Anupam.

C and Q are sisters and A is the son of C. Hence, C is the mother of A or Z is the mother Q.

Hence, Z is the maternal grandmother of A. P is the son of Z. Hence, P is the maternal uncle of A.

M is the father of N and N is the son of V.

Hence, V is the mother of N.

From (1), P is the brother of V

Therefore, M is the brother-in-law of P because V is the wife of M.

From (2), the daughter of N, is the granddaughter of V. From this we do not get any relation of M to P.

I x C → I is the sister of C

C + N → C is the daughter of N

and N - J → N is the brother of I.

Hence, I is niece of J.

1. In option A:- P is great grandmother of Q (P is mother of N is father of M is father Q, 3 generations).
2. In option B:- Q is great grandfather P (Q is the father of N is the father of M is mother of P, 3 generations).
3. In option C:- Q is the uncle of P (Q is the brother of M is brother of N is father of P).
So the last option "None of these" is correct.