Select the correct option based on statements below:
Assertion (A): SF6 cannot be hydrolysed but SF4 can be.
Reason (R): Six F-atoms in SF6 prevent the attack of H2O on sulphur atom of SF6
  
1. Both (A) and (R) are True and (R) is the correct explanation of (A).
2. Both (A) and (R) are True but (R) is not the correct explanation of (A).
3. (A) is True but (R) is False.
4. (A) is False but (R) is True.
HINT: Steric hindrance in the case of SF6 
 is not easily hydrolysis because here S atom is surrounded by 6F atom so it's complected for  to attack  but in
case of  here S atom is surrounded by 4F atom so it's to attack by