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Gas escapes from the surface of a planet because it acquires an escape velocity. The escape velocity will depend on which of the following factors : I. Mass of the planet II. Mass of the particle escaping III. Temperature of the planet IV. Radius of the planet Select the correct answer from the codes given below :

(a)      I and II                                       (b)  II and IV

(c)   I and IV                                     (d)  I, III and IV

Answer: c

(4)

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