Consider the following Statements

1.    Gram Sabha means body consisting of persons present in the villages comprised within the area of Panchayat at the village level.

2.    Panchayats at the intermediate level may not be constituted in a State having a population not exceeding 20 lakh people.

3.    The establishment of scheme of democratic decentralization, which ultimately came to be known as Panchayati Raj, is given by Balwant Rai Mehta.

Which of the above is/are correct?