I believe the answer is C, Hopefully this is right. If it's wrong I'm truly sorry.
Answer:
Dear Sir/Mam, I am (Your Name), student of (Class And Section). I would like to bring to your kind attention that due to (Mention your reason) I will unable to come to school for next (Number Of Days). I request you to kindly provide me with leave for (Number of days) from (start date) to (end-
