Answer.

Let that come out during mentor mentee discussions in a natural manner. If mentor wants money or some return he may tell you directly or you may read the signals.

Hi Mohd, this is a question that many early stage startups have. Glad you brought it out. The fundamental difference between a mentor and a good mentor is that a good mentor believes in you and your startup. Which usually means they would want some skin in the game. The best test of that is not asking for equity in return of mentorship (a.k.a. a commercial transaction), but investing in the equity of the startup (a.k.a. commercial interest). There are a lot of people who ask for equity in return for mentoring. Flip the question to them, if they really like your idea enough for them to take time out and guide you, why do they not chip in some of their cash as well?