The correct answer is: Home and distant signals.
A C’ class station is a small station with a single platform. In a two-aspect signalling system, there are two types of signals: home signals and distant signals. Home signals are located at the entrance to the station, and distant signals are located some distance before the home signals. The home signal indicates whether a train is allowed to proceed into the station, and the distant signal indicates whether the train is on the correct track.
Corner signals are used to protect the entrance to a siding or branch line. Warner signals are used to warn trains of approaching danger. Sectional signals are used to divide the track into sections, and to control the movement of trains between sections.
In a two-aspect signalling system, home and distant signals are the only signals that are required at a C’ class station. Corner, Warner, and sectional signals are not required at this type of station.