Q. You can rely . . . . . . . . him to be there whenever you need him.
✅ Correct Answer: (D)
on
Explanation: 'Rely on' means 'to need a particular thing or the help and support of someone or something in order to continue, to work correctly, or to succeed'. Hence it makes the sentence meaningful.
Explanation by: Team MCQ Buddy
'Rely on' means 'to need a particular thing or the help and support of someone or something in order to continue, to work correctly, or to succeed'. Hence it makes the sentence meaningful.