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:

Too little is known by this time about possible side effects of the drug.

• 1
  presently
• 2
  in the end
• 3
  before hand
• 4
  No improvement