The headquarter of Eastern Naval command is at:

Three of the following four letter-clusters are alike in a certain way and one is different. Pick the odd one out. 

Select the option that is related to the third number in the same way as the second number is related to the first number:

54: 486 :: 26:?

Select the option that is related to the third word in the same way as the second word is related to the first word.

Expand: Enlarge :: Reduce: ?

Select the option that is related to third cluster in the same way second cluster is related to first cluster.

MT : 228 :: QX : ?

Select the related word/letters/number from the given alternatives.

"Amplify" is related to "Increase", in the same way as "Fragile" is related to "____".

Select the option that is related to the third number in the same way as the second number is related to the first number.

19: 304:: 22: ‘?’.

Given set:  278, 257, 365