The correct crontab entry to execute the script chklog once per hour between 3 p.m. and 5 p.m. on Monday and Thursday each week is, which of the following?

The hours `3,4,5` represent 3 AM, 4 AM, and 5 AM, not PM, and `2,5` represent Tuesday and Friday, not Monday and Thursday.

The hours `3,4,5` represent 3 AM, 4 AM, and 5 AM, not PM.

The crontab entry `0 15,16,17 * * 1,4 chklog` is correct because `0` specifies the minute (start of the hour), `15,16,17` specifies 3 PM, 4 PM, and 5 PM in 24-hour format, `* *` means every day and month, and `1,4` specifies Monday and Thursday (where Sunday is 0 or 7).

Placing `1,4` in the day of month field means the script would run on the 1st and 4th of each month, not specifically on Monday and Thursday of each week.

Using `*` in the minute field means the script would run every minute between 3 PM and 5 PM, not once per hour.