plz explain it with tge help of a diagram

plz explain it with tge help of a diagram Th orque on a planet about the centre of sun is Zero (2) Negative (3) Positive 12

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Torque, t-> on a body is the rate of change of linear momentum with respect to time.

As, in the Universe, Linear Momentum |L->| for all inter planetary systems is conserved and constant at finite distance, hence, |L->| is constant.

So, t-> = dL / dt = 0

Hence, correct answer is 
                        (1) Zero.
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