Explanation

There are three on-off switches on a control panel A, B, and C. They have to be changed from an initial setting to a second setting according to the following conditions:

• In case only switch A is the switch on in the initial setting, then turn on switch B.
• In case switches A and B are the only switches on in the initial setting, then turn on switch C.
• In case all the three switches are on initially setting, then turn off the switch C.
• For any other initial setting, turn on all switches that are off and turn off all switches, if any, that are on.

Question

In case of switch, A is off in the second setting, which among the following could have been the initial setting?

A) A on, B on, C on.

B) A on, B on, C off.

C) A on, B off, C on.

D) A on, B off, C off.

E) A off, B on, C off.