Step-by-step Solution:

Quick Solution

The best way to solve this type of blood relation puzzle is to break down the statement from the end to the beginning, establishing the relationships step-by-step from Krishna's perspective.

1. Deconstructing the Statement

1. "...of my mother"This refers to Krishna's Mother.
2. "...grandson of my mother"His mother's grandson is Krishna's own Son. (In the absence of information about siblings, we assume the most direct relationship).
3. "This girl is the wife of [the grandson of my mother]"This means the girl is the wife of Krishna's Son. A son's wife is a daughter-in-law.

The relationships can be visualized as:

2. Determining the Relationship

- The statement identifies "the girl" as Krishna's daughter-in-law.
- The question asks how Krishna is related to the girl.
- Krishna is the father of the girl's husband.

Final Answer: Krishna is the girl's Father-in-law.