Concept:Blood relation questions are solved by tracing family links step by step.
Explanation:Let the lady be
L.
L's mother is
M.
M's only grandson is Diwakar's son.
So Diwakar's son is the grandson of
M.
Thus Diwakar is either the son or the son-in-law of
M.
Since Diwakar says “her mother”, not “my mother”, he is not
M's son.
Therefore, Diwakar is the son-in-law of
M.
That means Diwakar is married to
M's daughter, who is the lady
L.
So the lady is Diwakar's wife.
Answer:The lady is Diwakar's wife.
