Q:

The teacher asked the student when he would submit his assignment 

• 1
  The teacher asked the student, " When would you submit his assignment? "
• 2
  The teacher asked the student , " When would he submit his assignment ? "
• 3
  The teacher said to the student, " When will you submit your assignment ? "
• 4
  The teacher asked the student , " When will you submit his assignment ? "