Question

Change to passive voice? "The scientist said to me, "You are the future of India".

Answer 1

I was told by the scientist, "You are the future of India"

Explanation:

If we simplify the sentence in the question a bit, we get:

The scientist said to me, "Quote", with "Quote" being the future of India statement.

We flip flop the subject and object ("me" becomes "I" and is moved to the front of the sentence and "The scientist" is moved to where "me" was:

I said to the scientist, "Quote"

Ok - now to work with the verb. It's the scientist who spoke to me, and so we can use a verb like:

I was told by the scientist, "Quote"

(Note - with passive forms, 'by' is used to refer to the agent - who is doing the action.)