For election to the Lok Sabha, a nomination paper can be filed by

(a) anyone residing in India.
(b) a resident of the constituency from which the election is to be contested.
(c) any citizen of India whose name appears in the electoral roll of a constituency.
(d) any citizen of India.

M.Laxmikanth confirms: Chapter 22 Parliament, Page 22.4:

• He must be a citizen of India.
• He must be registered as an elector for a parliamentary constituency. This is same in the case of both, the Rajya Sabha and the Lok Sabha.