Q:

Wardha said to her sister, "How long do you intend to stay here?" 

• 1
  Wardha asked her sister that how long she intended to stay there.
• 2
  Wardha asked her sister how long she intended to stay there.
• 3
  Wardha asked to her sister how long she intended to stay here.
• 4
  Wardha asked her sister how long she intended to stay here.