Physics
The motion of the wheels of a bullock-cart while moving on the road is an example of

Translatory motion only
Translatory and rotatory motion
Oscillatory and translatory motion
Oscillatory and rotatory motion

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Physics
Purpose of an optical filter is to

Refract light of different colours
Transmit or absorb light of different colours
Reflect lights of different colours
Dispense light into component colours

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