Q, The geoid can be best defined as
A. an oblate spheroid that best approximates the shape of the earth.
B. a surface over which the value of gravity is constant.
C. the physical surface of the earth.
D. an equipotential surface of gravity of the earth.
![Determine the correctness (or otherwise) of the following Assertion [A] and the Reason [R]](https://www.gkseries.com/blog/wp-content/uploads/2023/10/Determine-the-correctness-or-otherwise-of-the-following-Assertion-A-and-the-Reason-R.jpg)
