Correct Answer: The young man said, “O God! Help me clear this interview.”

Solution : The correct choice is the fourth option.

The steps of conversion are as follows:

• The reporting verb changed "prayed" is changed to "said".
• The third-person pronoun "him" is changed to the first-person pronoun "me" in the direct speech version to match the perspective of the speaker.
• The expression "O God!" is retained as it is, preserving the original wording and emotional tone of the speaker.
• The words of the speaker are enclosed in the inverted commas.

Therefore, the direct form would be: The young man said, "O God! Help me clear this interview."