Choose the odd pair group in the following options?

Select the related letter/ word/ number/ figure from the given alternatives.
FEAR : ui :: BORN : ?

Choose the word which is least like the others word in a group?

Select the word pair in which the two words are related in the same way as the two words in the following word-pair.

Brass : Copper

Find the odd number

Three of the following words are alike in a certain manner and one is different. Find the odd one out.

An ‘Island’ is related to ‘Sea’ in the same way as an ‘Oasis’ is related to ‘_____’.

2 : 7 :: 6