a) 1 and 4 b) 1 and 3 c) 1,2 and 3 d) 2 and 3

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From diagram $\sin \theta=\large\frac{R}{R+h}$

minimum coaltitude $=\sin ^{-1} \bigg(\large\frac{R}{R+h}\bigg)$

The curved area AB on earth $=2 \pi R^2 (1-\sin \theta)$

Area on earth escaped from satellite $4 \pi R^2 - 2 \pi R^2 (1-\sin \theta)$

$\qquad= 2 \pi R^2 (1+\sin \theta)$

Hence d is the correct answer.

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