Read the following statements (S) and Explanation (E). Choose the correct answers from the codes (1), (2), (3) and (4):
S : is monobasic Lewis acid but salt exist.
E : reacts with to give .
1. S is correct but E is wrong
2. S is wrong but E is correct
3. Both S and E are correct and E is correct explanation of S
4. Both S and E are correct but E is not correct explanation of S