The great circle along which the sun appears to trace on the celestial sphere with earth as centre during the year, is called A. Equator B. Celestial equator C. Ecliptic D. None of these

The correct answer is: C. Ecliptic

The ecliptic is the apparent path that the Sun traces across the sky over the course of the year. It is a great circle on the celestial sphere, inclined 23.5 degrees to the celestial equator. The ecliptic is the plane of Earth’s orbit around the Sun.

The equator is the great circle around the Earth that divides it into two hemispheres, the Northern and Southern Hemispheres. The equator is also the plane of Earth’s equator, which is perpendicular to Earth’s axis of rotation.

The celestial equator is the great circle on the celestial sphere that is directly above Earth’s equator. It is the plane of Earth’s equator projected onto the sky. The celestial equator is also the line of zero declination.

None of the other options are correct.