What is the base level of the Panchayati Raj structure in India?

Gram Panchayat

The correct answer is Option 4- Gram Panchayat

The base level of the Panchayati Raj structure is the Gram Panchayat, which covers a village or a group of villages.

73rd amendment in Panchayati Raj institutions:
All States now have a uniform three tier Panchayati Raj structure. At the base is the ‘Gram Panchayat‘. A Gram Panchayat covers a village or group of villages. The intermediary level is the Mandal (also referred to as Block or Taluka). These bodies are called Mandal or Taluka Panchayats. The intermediary level body need not be constituted in smaller States. At the apex is the Zilla Panchayat covering the entire rural area of the District. The amendment also made a provision for the mandatory creation of the Gram Sabha. The Gram Sabha would comprise all the adult members registered as voters in the Panchayat area. Its role and functions are decided by State legislation.