Choose or find odd pair of words - (Cow : Calf), (Dog : Bitch), (Lion : Cub), (Tortoise : Turtle), (Insect : Larva)

B. DOG : BITCH

Arun said, "This girl is the wife of the grandson of my mother."
Who is Arun to the girl ?

D. FATHER-IN-LAW

Complete analogous pair - Bread : Yeast : : Curd : ?

B. BACTERIA

Choose or find odd pair of words - (Door : Bang) , (Piano : Play) , (Rain : Patter) , (Drum : Beat)

B. PIANO : PLAY

Choose the correct alternative from the following : - Assertion (A) : There is no vaccine for AIDS.
Reason (R) : The AIDS virus changes its genetic code.

A. BOTH A AND R ARE TRUE AND R IS THE CORRECT EXPLANATION OF A.