The provision for reservation of seats for women in Panchayats is mentioned under Article 243 D of the Constitution of India. This article specifically deals with the reservation of seats for Scheduled Castes, Scheduled Tribes, and women in Panchayats.

Option 1, Article 243 B, is not the correct answer as it relates to the composition of Panchayats and states that the number of seats to be reserved for Scheduled Castes and Scheduled Tribes should be in proportion to their population in the Panchayat area.

Option 2, Article 243 C, is not the correct answer as it pertains to the reservation of seats for Scheduled Castes, Scheduled Tribes, and women in Municipalities, and not for Panchayats.

Option 4, Article 243 E, is not the correct answer as it deals with the reservation of offices of Chairpersons in Panchayats and Municipalities for Scheduled Castes, Scheduled Tribes, and women.

Therefore, the correct answer is option 3, Article 243 D, which specifically provides for the reservation of seats for women in Panchayats in India.