When preparing a title page of a transcript, which of the following expressions should be avoided?

The expression to avoid when preparing a title page of a transcript is "4:30 p.m. in the afternoon." This phrase is redundant because "p.m." already indicates that the time is in the afternoon. Therefore, including "in the afternoon" after specifying a time in the p.m. format unnecessarily repeats the same information, which can lead to confusion or make the text seem less professional. It's preferable to use concise and clear expressions of time that convey the information effectively without redundancy.

The other expressions presented are appropriate. Simply stating "4:30" conveys the time without excess wording. "4:30 o'clock" is another acceptable way to express time, although "o'clock" is less commonly used in formal writing today. Similarly, "9:30 in the morning" effectively communicates the time without any redundancy, as it clearly indicates the hour while providing the context of morning.