Choose the alternative which can be substitute for the following? “Time after twilight and before night’

The correct answer is C, Dusk. Dusk is the fading part of the evening, when the sky has lost its brightness after sunset and night has not yet fully set in. That is exactly the interval the question describes.

• Evening is far too broad. It covers the whole stretch from late afternoon onwards, so it does not pin down the specific phase between twilight and night.
• Dawn is the opposite end of the day. It is the start of morning, the first light before sunrise, so it cannot follow twilight after sunset.
• Eclipse is an astronomical event in which one celestial body blocks another, such as the Sun or Moon. It is not a time of day.

This is a basic vocabulary item, but it links to Mains answers on the physical and cultural description of time and seasons. Keep dawn and dusk as a pair when you revise word substitution, since the question often tests the difference between them.

Trap: aspirants pick Evening because it sounds right, but the question asks for the precise word for the dimming phase, which is Dusk.