What is the correct way to express 1:30 AM in military time?

The correct way to express 1:30 AM in military time is 0130. In military time, hours are represented in a 24-hour format, starting from midnight, which is 0000. To convert standard time to military time, you add 12 to any hour that is greater than 12 PM. However, for times that are between midnight and noon (like 1 AM), you simply retain the hour as is and precede it with a zero to maintain a four-digit format.

So, 1 AM is represented as 01 and you append the minutes, which gives you 0130. This reflects one hour and thirty minutes into the day, fitting into the military time convention utilized for clear and precise communication. The other choices reflect times that either occur later in the day or do not correspond correctly to 1:30 AM in military format.