Q:

Nandita said to Nitin, “Can you solve this sum ?” 

• 1
  Nandita asked Nitin if he could solve this sum.
• 2
  Nandita asked Nitin if he could solve that sum.
• 3
  Nandita asked Nitin if could he solve this sum.
• 4
  Nandita asked Nitin if could he solve that sum.