The 24-hour clock system

The 24-hour clock system is a way of telling time where the day is divided into 24 hours, starting from midnight (00:00 hours) and ending at the next midnight (24:00 hours). It is commonly used in many countries around the world, including military and aviation industries.

P.M. and the 24-hour clock

In the 24-hour clock system, the letters "p.m." are not used. Instead, the hours from 12:00 p.m. (noon) to 11:59 p.m. are represented by the numbers 12 to 23. This means that the time corresponding to p.m. in the 24-hour clock system is 12:00 hours.

Explanation of the options

Let's analyze the given options and see which one corresponds to p.m. in the 24-hour clock system:

a) 10:00 hours: This time corresponds to 10:00 a.m., not p.m. In the 24-hour clock system, it would be represented as 10:00.

b) 01:00 hours: This time corresponds to 1:00 a.m., not p.m. In the 24-hour clock system, it would be represented as 01:00.

c) 13:00 hours: This time corresponds to 1:00 p.m. In the 24-hour clock system, it would be represented as 13:00. While this option represents a p.m. time, it does not correspond to p.m. in the 24-hour clock system.

d) 12:00 hours: This time corresponds to 12:00 p.m., which is noon. In the 24-hour clock system, it would be represented as 12:00. This option represents the correct time corresponding to p.m. in the 24-hour clock system.

Therefore, the correct answer is option 'D' - 12:00 hours.