Direction: A sentence/a part of the sentence is underlined. Four alternatives are given to the underlined part which will improve the sentence. Choose the correct alternative. In case no improvement is needed, "No improvement" is the answer.
-
Mankind does not know this
-
- do
- had
- is
- No improvement
Correct Option: D
As we know that ,
Mankind does not know this is correct usage .
Thus , No improvement will be in above given sentence .So , option D is correct answer .
