Just as a volcano is related to lava, in the same way, fire is related to what?

The first two words are related in a certain way. Choose the correct option to replace the question mark (?) having the same relationship with the third word:
Aeroplane : Hangar :: Guns : ?

Select the option that is related to the third word in the same way as the second word is related to the first word.
USA : Congress :: India : ?

There are two blanks marked I and II. The words to fill in these blanks are given againts I as (A, B, C, (D) and II as (P, Q, R, S) respectively. The words on either side of the sign (::) have a similar relationship. Find the alternatives that signifies correct relationship.

I : Increase : Descend ::: II

There are two blanks marked I and II. The words to fill in these blanks are given againts I as (A,B,C,D) and II as (P,Q,R,S) respectively. The words on either side of the sign: have a similar relationship. Find the alternative that signify correct relationship.

Water is related to Ocean in the same way as Snow is related to

Complete the analogy: Port Blair : ? :: Thimphu : Bhutan