This is how ignorant illiterate people are treated.
But so far as you are concerned, you have become aware. Under Sec.160, if police thinks that you can be a witness or may know something about crime, he can call you to police station and ask questions. But he cannot call you if you are named as accused. Sec.160 powers are only for prospective witnesses.
After asking you some questions, he can also record it in writing.
And then the CATCH:
Then, he can ask you to sign below what you have just said.
Here, You can say NO. You can say that Under Sec.162, specific, direction is there to police that no signatures are to be taken below such statements.
If he threatens, tell him that under Sec. 163, Police is not supposed to threaten any witness for making statement.