For an email requesting a project deadline extension, Which detail is most necessary?

D. subject line, polite request and reason

Step 1: Identify the concept: writing skill: email writing. Step 2: The task needs subject line, polite request and reason, so the reader gets complete information. Step 3: Exam tip: In email, always check audience, purpose and format.

Step 1: यहाँ writing skill: email writing पहचानना है। Step 2: email में subject, विनम्र अनुरोध और कारण हो Step 3: याद रखें: email में audience और purpose हमेशा याद रखें।