131 seats are reserved for representatives of Scheduled Castes and Scheduled Tribes in Lok Sabha. Some seats are reserved in Lok Sabha for the members of the Scheduled Castes and Scheduled Tribes. As per the order issued by the Delimitation Commission in 2008, 412 are general, 84 seats are reserved for Scheduled Castes, and 47 seats for the Scheduled Tribes. Hence option 3 is correct. Earlier it was 79 and 41 for Scheduled Castes and Scheduled Tribes respectively.

Answer: A) a pair of scissors Explanation: Any of the basic mechanical devices for applying a force are called simple machines. There are 6 basic simple machines; the lever, the wheel and axle, the inclined plane, the wedge, the pulley, and the screw. Several of these simple machines are related to each other. But, each has a specific purpose in the world of doing work.