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Consider following cases:(P) A planet re...

Consider following cases:(P) A planet revolving in an elliptical orbit. (Q)A planet revolving in a circular orbit. Principle of conservation of angular momentum comes in force in which of these:

A

Only for (P)

B

Only for (Q)

C

For both, (P) and (Q)

D

Neither for (P), nor for (Q)

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