In the following questions, a sentence/part of the sentence is printed in bold. Below are given alternatives to the bold sentence/part of the sentence at (1), (2) and (3) which may improve the sentence. Choose the correct alternative. In case no improvement is needed, your answer is (4).
Too little is known by this time about possible side-effects of the drug.

Options

A. presently
B. in the end
C. before hand
D. No Improvement

Answer

A

Explanation

(1) presently (Adv.): now, currently, at the time you are speaking
by this time : a particular allotted time
Here, presently is the right usage.