Which one of the following statements in relation to Panchayats is not correct?

1. ALegislature of a State may, by law, make provisions with respect to the composition of Panchayats.
2. BPanchayat area means the territorial area of a Panchayat.
3. CGram Sabha includes all persons in the electoral rolls of village within a Panchayat.
4. DReservation of seats for SCs and STs has nothing to do with proportion of their population.