Both earth and moon are subject to the gravitational force to the sun. As observed from the sun, the orbit of the moon

will be elliptical.

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will not be strictly elliptical because the total gravitational force on it is not central.

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is not elliptical but will necessarily be closed curve.

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deviates considerably from being elliptical due to influence of plants other than earth.

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Solution

The correct option is B will not be strictly elliptical because the total gravitational force on it is not central.
If the moon were to experience only the gravitation of the earth only then the path would have been elliptical but in the present case moon experience the gravitational force of sun as well which distorts the path.

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