The correct options are
A Scheduling elections to the Lok Sabha, the Rajya Sabha, and the State Legislatures.
C Scrutiny of all documents submitted by candidates contesting elections.
D Allocating symbols to political parties and independent candidates.
The Election Commission is responsible for the conduct, schedule & superintendence of elections to the Lok Sabha, the Rajya Sabha, the State Legislatures and also for the offices of the Vice President and the President. It also registers the political parties and grants them various symbols. Portfolio allocation after government formation, however, is the responsibility of the Head of Government.