Balaji is the grandson of Eashan, who is the husband of Charu. Dakshata is the wife of Pavan, who is the father of Balaji. Charu is the mother of Sukesh, who is the brother of Pavan. How is Balaji's mother related to Charu?

Let's break down the relations step-by-step to construct the family tree:
Eashan is married to Charu (Eashan(+)⇔Charu(−)).

Charu is the mother of Sukesh and Pavan (since Sukesh is the brother of Pavan). So, Eashan and Charu are parents to both Sukesh and Pavan.

Pavan is the father of Balaji.

Dakshata is the wife of Pavan (Pavan(+)⇔Dakshata(−)). Thus, Dakshata is Balaji's mother.

We need to find how Balaji's mother (Dakshata) is related to Charu.

Since Dakshata is married to Charu's son (Pavan), Dakshata is the Daughter-in-law of Charu.