As per the Constitution of India, Panchayats at the intermediate level may not be constituted in a state having a population not exceeding:

twenty lakh

The correct answer is Option 4 - twenty lakh

As per the Constitution of India, Panchayats at the intermediate level may not be constituted in a state having a population not exceeding twenty lakhs.

This is according to Article 243B(2) of the Constitution which states:

"(2) Notwithstanding anything in clause (1), Panchayats at the intermediate level may not be constituted in a State having a population not exceeding twenty lakhs."