Directions : In these questions , a part of the sentence is given in bold . Below are given alternatives to the bold part at (A) , (B) and (C) which may improve the sentence . Choose the correct alternative . In case no improvement is needed you answer is (D ) .

Q:

It had been raining all in the night. 

• 1
  rained all in
• 2
  been raining all through
• 3
  raining all in
• 4
  No improvement