Words given on the left side of (::) are related with each other by some Logic/Rule /Relation. Select the missing word/word pair on the right side of (::) from the given alternatives based on the same Logic/Rule/Relation.

Uttar Pradesh : Lucknow :: ?

West Bengal : Kolkata

Uttar Pradesh : Lucknow :: ?

The logic Followed here is :

Lucknow is the capital of  Uttar pradesh

Similarly

West Bengal : Kolkata

Kolkata is the capital of west bangal