Q 1311691520.     There are `10` lamps in a hall. Each of them can be switched on independently. The no. of ways in which the hall can be illuminated is?

A

`10^2`

B

`1023`

C

`2^{10}`

D

`10!`

HINT

This includes all the bulbs are kept in off so that the room is not illuminated.
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