B is the only child of the only daughter of C’s paternal grandfather....
B is the child of the sister of C's father. Therefore, C’s father is the maternal uncle of B.
Hence, the correct option is (A)
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B is the only child of the only daughter of C’s paternal grandfather....
Given information: B is the only child of the only daughter of C’s paternal grandfather.
To determine the relationship between C’s father and B, we need to trace the relationship between C’s paternal grandfather and B.
Let’s start by creating a family tree:
Paternal Grandfather of C
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Daughter of Paternal Grandfather of C
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B
From the family tree, we can see that B is the only child of the daughter of C’s paternal grandfather.
Now we need to determine the relationship between C’s father and B. Since C’s father is the brother of C, we need to determine whether C is the son of the paternal or maternal grandfather.
If C is the son of the paternal grandfather, then B is the daughter of C’s paternal grandfather’s daughter. Therefore, C’s father would be the maternal uncle of B.
If C is the son of the maternal grandfather, then B is not related to C’s paternal grandfather and we cannot determine the relationship between C’s father and B.
However, since the question specifies that C’s grandfather is the paternal grandfather, we can conclude that the correct answer is option A, maternal uncle.