Answer : 4. "Both (a) and (b)"
Explanation :

Before the Lok Sabha elections, former bureaucrats Sukhbir Singh Sandhu and Gyanesh Kumar have been selected as the new Election Commissioners. Let us tell you that the committee led by PM Modi has approved these names. Congress leader in Lok Sabha Adhir Ranjan Choudhary also took part in this selection process. On the basis of the recommendation of the selection committee, President Draupadi Murmu will appoint two members of the Election Commission.