In two aspects areas where shunting in the face of approaching train is not permitted, shunting can be permitted during ________ and under certain conditions (UP to FSS). A. Day B. Night C. Both D. None of these

The correct answer is: C. Both.

Shunting in the face of approaching train is not permitted in two aspects areas:

1. In the section between the home signal of a station and the first stop signal in the section.
2. In the section between the last stop signal in a section and the home signal of the next station.

However, shunting can be permitted during both day and night in these two aspects areas under certain conditions. These conditions are as follows:

1. The shunting movement must be authorized by the station master.
2. The shunting movement must be carried out under the supervision of a competent person.
3. The shunting movement must be carried out in accordance with the relevant safety procedures.

It is important to note that shunting in the face of approaching train is a very dangerous activity and should only be carried out in exceptional circumstances.