Question

Lakshmi is mother in law of surabhi who is sister in law of dilip.rajat is father of raman.the only brother of dilip.how lakshmi is related to dilip

Answer 1

lakshmi is dilip mother

Answer 2

Lakshmi is Dilip's mother.

Explanation for this -

Lakshmi is the mother-in-law of Surabhi.
Surabhi is the sister-in-law of Dilip.
Rajat is Raman's Father and Raman is Dilip's brother.
This means Raman is Surabhi's husband because Surabhi is Dilip's sister-in-law.
This means Lakshmi and Rajat are wife and husband 
and from this relation, Dilip is Lakshmi's son.