In the following question, which one set of letters when sequentially placed at the gaps in the given letter series shall complete it?
P _ R _ O _ _ E _ R _ S _ _ _ R O S

5255, 5306, __ 5408, 5459

In the following question, which one set of letters when sequentially placed at the gaps in the given letter series shall complete it?

a_b_a_c_a_bc

From the given alternatives select the word which cannot be formed using the letters of the given word.

CATERING 

d _ _td_s_d_st

In the following question, select the odd letters from the given alternatives.

Directions : Study the following alphanumeric series carefully and answer the questions given below:

12AIFR                  42 WBOL                             63EOCN                15TVMR               75GYTR

The letters which are attached with the numbers in which at least one is odd digit are arranged according to the ascending orders of their numbers from left to right and then all letters of the words together are arranged in the alphabetical order, then which of the following is the 9^th letter from the right end?

If 'Birds' is related to 'Fly', then 'Sharks' is related to