Who among following Urdu poets was invited to 2nd and 3rd Round Table Conferences?

Who among the following had not participated in the Second Round Table Conference?

Who among the following leaders did NOT participate in the Second Round Table Conference?

At which one of the following Round Table Conferences held in London was Mahatma Gandhi present?

The Indian National Congress did not take part in which of the following Round Table Conferences?

What was the name of Indian who participated in all three Round Table Conferences?