What is the end product of the nitrification process in

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

TURN : 219 :: MAINS: ?

Bee : Hum :: ?

Statement: X < U = F > R ≥ P < T < W

Conclusions: I. X < T

II. R > W

If 12 # 34 = 14 and 67 # 88 = 106, then 45 # 67 = ?

If PET = 16520 and PETER = 16520518, then PREHEAT =

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

55 : 86 :: 37 : ?

In the following question, select the odd number pair from the given alternatives.

If 21 @ 16 = 12 and 30 @ 25 = 12, then 22 @ 17 = ?'. What will come in place of question mark?