Please answer

48.  Which of the following statements is not correct about a planet rotating around the Sun in an elliptical orbit?

(A) Its kinetic energy is constant.
(B) Its angular momentum is constant.
(C) Its areal velocity is constant.
(D) Its time period is proportional to r3.

Dear Student
   If the planet is rotating about a planet around the sun in an elliptical orbit than time period is propotional to r cube.
Its aerial velocity is constant total energy is constant but  kinetic energy is not  constant and angular momentum is constant.

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