Match the items in column I with column II.

Column I	Column II
1. Lever of first type	nut and bolt
2. Inclined plane	nail
3. Lever of second type	pulley
4. Screw	sewing machine
5. Lever of third type	bottle-opener
6. Wedge	see-saw
7. Wheel and axle	ice-tongs

Find the odd one and give a reason for your choice.

Pulley, inclined plane, watch, screw jack

Find the odd one and give a reason for your choice

Mango-cutter, nut-cracker, bottle-opener, fire tongs

Choose the odd one and give reasons for your choice:

Pair of scissors, bread knife, water pump, see saw

Choose the odd one and give reason for the choice.

Ramp, revolving staircase, wheels, wooden plank

Choose the odd one and give reason for the choice.

Bottle-opener, screw jack, lemon squeezer, a pair of tongs