Coded Relationship Coded Relationship 1

Choice (B) and (D) are wrong as A + B means A is a mother, hence a female. Generation gap between A and D is (+1) + (+1) + (0) = 2. So, A must be a grandmother.

A x B so A is a sister, hence a female. Generation gap : (0) + (+1) + (0) + (+1) = +2.

So, A is E's grandmother's generation.
Correct choice

In choice (A), generation gap is : 0 + 1 + (+1) + 0 = 2. So, A is E's grandma's generation.
In choice (B), gap is : 0 + 1 + 0 + 0 = 1.

In choice (C), gap is: 1 + 0 + 1 + 0 = 2. So, A is E's grandma's generation. So, Choices (A), (C) and (D) are eliminated.

Correct choice: (B).

So, choice (B) is correct. Note that sex of K is not known.