Which of the following is/are correct with reference to the reservation of seats in the panchayats, as provided under the constitution?

1. Seats for the SCs and the STs are to be reserved in every panchayat in the proportion of their population to the total population in the panchayat area.

2. Of the seats reserved for the SCs and the STs, not less than one-third of the seats are to be reserved for women belonging to the respective categories.

3. The legislature of a state can make any provision for reservation of seats in any panchayat in favour of backward classes.

Select the correct answer using the code given below.