Q:

“Tinu, where have you been all these days ?” asked the Principal. 

• 1
  The Principal asked Tinu where had he been all those days.
• 2
  The Principal asked to Tinu where was he all those days.
• 3
  The Principal asked Tinu where he had been all those days.
• 4
  The Principal asked Tinu where he has been all those days.