Question

The star which lies immediately above the Earth’s North Pole is called the
(A) Pole star
(B) Alpha centauri
(C) Sun
(D) None of these

Answer 1

To solve this question we have to know that the polar star is approximately aligned with the earth’s axis of rotation. Its apparent position is close to the celestial North Pole, which we know, lies approximately directly overhead when viewed from earth’s North Pole. The current polar star is Polaris also known as the North Star.

Complete step by step answer:
We know that, Pole star or polar star is the name of Polaris in the heavenly body of urea minor as it is the star nearest to the world's divine North Pole. We know that also, it is known as the pole star as it lies straightforwardly in accordance with the hub of the Earth over the North Pole. It is just obvious in the Northern Hemisphere and can be utilized to show the genuine North. Polaris is as of now the Northern pole star. The world's north pivots over the North Pole by and by directions nearest toward Polaris. We can say, A pole star is a noticeable star, ideally an unmistakable one, that is around lined up with the Earth's hub of revolution; that is, a star whose evident position is near one of the divine poles, and which lies roughly straightforwardly overhead when seen from the Earth's North pole or South Pole.
We know that, as the name indicates, the pole star lies exactly above the earth’s North Pole.
Hence, the correct answer will be option (A).

Note:
A comparable idea likewise applies to planets other than the Earth. Practically speaking, the term pole star usually alludes to Polaris, which is the current northern pole star, otherwise called the North Star.