A body ' \( A \) ' moves with constant velocity on a straight line path tangential to the earth'...

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A body ' \( A \) ' moves with constant velocity on a straight line path tangential to the earth's surface. Another body ' \( B \) ' is thrown vertically upwards, it goes to a height and falls back on earth. A third body ' \( C^{\prime} \) is projected to an angle and follows a parabolic path as shown in figure
[MP PMT 2009]
The bodies whose angular momentum relative to the center of the earth is conserved are
(a) B only
(b) \( \mathrm{B} \) and \( \mathrm{C} \)
(c) \( \mathrm{A}, \mathrm{B}, \mathrm{C} \)
(d) None of the above
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