Passport - Mother's name

[immihelp]

Dear Sir/Madam,

I have to renew my passport. In my current passport mother's name is
Sushilaben (my step mother). My real mother is Madhuben.

Please help me decide which name should come as mother's name in my
renewed Passport?

[immihelp]

That depends upon who is your legal current mother.

Did your stepmother legally make you her son? If so, she is your mother.
Otherwise, she is just the wife of your father, not really your mother.