Question

who presides over the meetings of rajya sabha and lok sabha

Answer 1

THE SPEAKER presides over the meeting of lok sabha.
0000000000-0--00--000000000000
and 
THE VICE PRESIDENT presides over the meetings of rajya sabha.
and 
THE SPEAKER presides over joint sitting of both houses.

Answer 2

The Vice-president of India (currently, Venkaiah Naidu) is the ex-officio chairman of the Rajya Sabha, who presides over its sessions. The deputy chairman who is elected from amongst the house's members, takes care of the day-to-day matters of the house in the absence of the chairman

HOPE THIS WILL HELP YOU
PLZ MARK AS BRAINLIEST IF MY ANSWER IS USEFUL FOR YOU!!!!!!!!!.