Read the following sentences and answer the question that follows:
1. I have good knowledge of German.
2. Except for Rajiv, everybody was there.
3. Whole Delhi was celebrating Independence Day.
4. Neither the dog, nor is the cat responsible for this mess.
5. He knows to swim.
6. I look forward to seeing you.

Which of the above are grammatically INCORRECT?

A

2,4,6

B

4,5,6

C

1,3,5

D

3,5,6

E

1,2,5