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Comment on the correctness or otherwise of the following statements:- 
(i) {a, b, c}={c, b, a}
(ii) {a, c, a, d, c, d} ? {a, c, d}
(iii) {b} ? {{b}}
(iv) {b}? {{b}} and ?? {{b}}. 
  • a)
    Only (iv) is incorrect 
  • b)
    (i) and (ii) are incorrect 
  • c)
     (ii) and (iii) are incorrect 
  • d)
     All are incorrect 
Correct answer is option 'A'. Can you explain this answer?
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Comment on the correctness or otherwise of the following statements:-(...
 
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Comment on the correctness or otherwise of the following statements:-(...
Correctness of given statements:

(i) {a, b, c}={c, b, a}
This statement is correct. The order of elements in a set does not matter, so {a, b, c} is equivalent to {c, b, a}.

(ii) {a, c, a, d, c, d} ? {a, c, d}
This statement is incorrect. The set on the left-hand side contains two "a" elements and two "d" elements, while the set on the right-hand side only has one of each. Therefore, the sets are not equivalent.

(iii) {b} ? {{b}}
This statement is correct. The set on the left-hand side contains the element "b", while the set on the right-hand side contains a set with the element "b". These two sets are equivalent.

(iv) {b}? {{b}} and ?? {{b}}
The first part of this statement is correct. The set on the left-hand side contains the element "b", while the set on the right-hand side contains a set with the element "b". These two sets are equivalent. However, the second part of the statement is not a valid statement. The "?? {{b}}" part is not a valid set notation.

Therefore, option A is the correct answer as only statement (iv) has an incorrect part.
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Comment on the correctness or otherwise of the following statements:-(i) {a, b, c}={c, b, a}(ii) {a, c, a, d, c, d} ? {a, c, d}(iii) {b} ? {{b}}(iv) {b}? {{b}} and ?? {{b}}.a)Only (iv) is incorrectb)(i) and (ii) are incorrectc)(ii) and (iii) are incorrectd)All are incorrectCorrect answer is option 'A'. Can you explain this answer?
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