Question : Change the speech.
Bala's mother, "Will you lock the door, Bala ?"
Option 1: Bala's mother asked Bala if he would lock the door.
Option 2: Bala's mother asked Bala if he can lock the door.
Option 3: Bala’s mother said lock the door.
Option 4: Bala's mother told Bala that he need not lock the door.
Option 5: Bala's mother asked Bala if he had locked the door.
Correct Answer: Bala's mother asked Bala if he would lock the door.
Solution : Rest of the options change the meaning.