Step-by-Step Analysis of the Relationship

To determine how Pushpa is related to the boy, we need to break down the statement made by Aruna into two parts and then find the connection.

The statement is: "The mother of his father is wife of your maternal grand - father."

Part 1: Identifying the boy's relative

• "The mother of his father" refers to the boy's father's mother.
• A person's father's mother is their paternal grandmother.

Part 2: Identifying Pushpa's relative

• "wife of your maternal grand - father" refers to the wife of Pushpa's mother's father.
• The wife of a person's maternal grandfather is their maternal grandmother.

Connecting the two parts

Aruna's statement equates these two relatives. This means:

The boy's paternal grandmother = Pushpa's maternal grandmother.

If they share the same grandmother, but through different family lines (paternal for the boy, maternal for Pushpa), it means that the boy's father and Pushpa's mother are siblings (a brother and sister).

Conclusion

Since the boy's father and Pushpa's mother are siblings, the boy and Pushpa are first cousins. The option "Cousin sister" indicates that Pushpa is the boy's female cousin.

Therefore, Pushpa is the boy's cousin sister.