Taxation of charitable trust - exemption u/s11

In my view.

 as per sec.13(1)a If it is a trust formed for private religious purpose then benefit of section 11 would not apply.

To answer the second question the words of Sec.13(1)a read as follows "any part of income of property held undera trsut for private religious purpose which does not enure for the benefit of the public"

Since they have mentioned clearly that it has to be for the benefit of public, it necessarily has to be a public charitable trust.

We can wait for other views as well.