The correct answer is: A. Station diary
A station diary is a document that is used to record all of the activities that take place at a railway station. It is used to keep track of train movements, passenger arrivals and departures, and any other incidents that occur at the station. The station master is responsible for maintaining the station diary and making sure that it is up-to-date.
A diary is a personal journal that is used to record thoughts, feelings, and experiences. It is a private document that is not shared with others.
A mid section is a part of a railway track that is located between two stations. It is used to allow trains to pass each other.
None of these is the correct answer because it is not a place where the station master can make entries.
I hope this helps! Let me know if you have any other questions.