NIMCET 2013 Question Paper with solutions

Questions 74 to 76 are based on the following:
There are three switches A. B and C which can be in ON/OFF position. Their setting change as per the following rules:
i) If A is the only switch as ON, change B to ON.
ii) If A and B are only switches as ON, change C to ON.
iii) If all three switches are ON, change C to OFF.
iv) For all other situations, all switches in ON are changed to OFF and all switches in OFF are changed to ON.