Which of the following will run a file named /myscript every 23 minutes past midnight every two hours?

A.
23 0-23/2 * * * /myscript

B.
23 */0-23 * * * /myscript

C.
23 @2 * * * /myscript

D.
11 2/0-23 * * * /myscript

Explanation:
crontab job syntax: minutes hours days months day/week command
also correct would be 23 */2 * * * /myscript