## Blood Relations

#### Blood Relations

1. A is the brother of B. A is the brother of C. To find what is the relation between B and C. What minimum information from the following is necessary?
(i) Gender of C (ii) Gender of B

1. Without knowing the gender of C, we can’t be determined whether B is sister of C or B is brother of C.

##### Correct Option: D

Without knowing the gender of C, we can’t be determined whether B is sister of C or B is brother of C. Similarly without knowing the gender of B we can’t be determined whether C is sister of B or C is brother of B.
Therefore, both (i) and (ii) are necessary.

1. Introducing a man, a woman said, “His wife is the only daughter of my mother.” How is the woman related to that man?

1. Clearly, only daughter of her mother is woman herself.

##### Correct Option: B

Clearly, only daughter of her mother is woman herself. So, that woman is the wife of man.

1. A man pointing to a photograph says, “The lady in the photograph is my nephew’s maternal grandmother.” How is the lady in the photograph related to the man’s sister who has no other sister?

1. Clearly, the lady is the grandmother of man’s sister’s son i.e., the mother of the mother of man’s sister’s son.

##### Correct Option: C

Clearly, the lady is the grandmother of man’s sister’s son i.e., the mother of the mother of man’s sister’s son i.e., the mother of man’s sister.
So, the lady is man’s mother.

1. Pointing to a photograph, a man said, “ I have no brother or sister but that man’s father is my father’s son.” Whose photograph was it?

1. Since the narrator has no brother, his father’s son is he himself. So, the man who was talking is the father of the man in the photograph.

##### Correct Option: B

Since the narrator has no brother, his father’s son is he himself. So, the man who was talking is the father of the man in the photograph, i.e. the man in the photograph is his son.

1. Pointing to a girl, Abhishek said, “She is daughter of the only child of my father.” How is Abhishek’s wife related to that girl?

1. Girl is daughter of the only child of Abhishek’s father or, Girl is daughter of Abhishek.

##### Correct Option: B

Girl is daughter of the only child of Abhishek’s father or, Girl is daughter of Abhishek.
Hence, girl is daughter of Abhisek’s wife.