Odd Man Out

All except Radio waves are short wavelength radiations.

In all other groups, the first, second and third letters are respectively two, four and six steps ahead of the second, third and fourth letters respectively.

All except Billiards are outdoor games.

In all other pairs, the two words are antonyms of each other.

Except Veranda, all others have door.

All except Think are functions performed by sense organs.

In all other pairs, the two words belong to the same class.

All except Iron are very volatile.

All except Mustard are foodgrains, while mustard is an oilseed,

In all other pairs, second number is 6 times the first.