Question

The full moon night is called:
A. Purnima
B. Amabasya
C. Both (A) and (B)
D. None of them

Answer 1

Hint: Full moon is the lunar phase or moon phase when the moon appears to be fully illuminated when viewed from earth’s perspective. This occurs when the earth is located in between the sun and the moon. This means that the lunar hemisphere (half of moon) when facing the earth is completely illuminated by the sun and appears as a circular disk. The full moon usually occurs roughly once in a month.

Complete answer:
In Hinduism the full moon is known as purnima. And the Purnima is celebrated as an auspicious day.

So the correct option is A. Purnima.

Additional Information:
Lunar eclipse: When the moon is in between the sun and the earth, the earth’s shadow falls on the moon. This is called lunar eclipse. During lunar eclipse moon may appear reddish due to refraction of sunlight through the earth’s atmosphere. The lunar eclipse occurs only on full moon day.
The moon orbits the earth in an elliptical orbit. The moon moves counterclockwise and the same side of the moon always faces towards the earth. However over time the moon moves slightly from north to south and moves unsteadily from east to west. This motion of the moon is known as lunar liberation due to which $58\%$ of the moon's surface is visible from earth.
The orbit of the moon around the earth is elliptical . The point on the moon’s orbit closest to earth is known as perigee and the farthest point on the orbit is known as apogee. When the moon comes close to the closest point i.e, perigee it is known as a supermoon or super full moon. When the moon is at the farthest point on the orbit i.e. at apogee it is known as micromoon.

Note:
The full moon is a phase of the moon where the moon is completely lit by the sun whereas in the new moon the moon is completely shadowed by earth. In the new moon the sun and moon are aligned so that both the sun and the earth lie on opposite sides of the moon.
High tides come during the new moon because the gravitational pull of the sun and moon is combined and they pull ocean water high. These tides were also known as king tides