Directions: Which of the following phrases given below in the options should replace the phrase that is underlined in the sentence to make it grammatically correct? If the sentence is correct and does not require any correction mark 'No correction required' as your answer.
Pollution in Delhi is increasing day by day; try to cover so many of your head as you can.
1
as many of your head as
2
as much of your head as
3
so much of your head as
4
as much of your head so
5
No improvement required