When the king asked Birbal, he replied, “Your Majesty, all the other people were looking at you closely to imitate you adequately. While, you were calmly sitting with your composed demeanor. This is because you did not need to look for any support however the commoners always look for their king’s support.”

the answer will be 1.

we have to go to that room only once.

Steps:
First switch on the first switch, keep it on for say 2-3 minutes.
then switch of first switch and on the second switch.
as soon as u on the second switch go to the room.

If you found that the bulb is glowing  that means the second switch corresponds to the room.
if not then touch the bulb if it is warm that means it corresponds to the second switch if not then it corresponds to the third switch.

Let’s assume, person starts with Rs x
After 1st temple visit, he is left with Rs (2x-100)
After 2nd temple visit, he is left with Rs (4x-300)
After 3rd temple visit, he is left with Rs (8x-700)
After 4th temple visit, he is left with Rs (16x-1500), which is zero (as he is left with empty pockets)
Hence he started of with x i.e. Rs 1500/16 i.e. Rs 93.75