The SI unit for measuring temperature

Biz is older than Ciz but not as old as Diz. Eiz is not as old as Biz. Who is the oldest of all?

In the following question, select the related word from the given alternatives.

GSJM : PMVJ : : USBN : ?

Black : Sorrow ∷ Red : ?

If 66 @ 26 = 15' and 44 @ 6 = 12', then 56 @ 12 = ?'. What will come in place of question mark? 

Select the option in which the numbers are related in the same way as are the numbers of the following sets.

(14, 130, 12)

(32, 245, 17)

M/14 : O/12 : : U/6 : ?

Select the combination of letters that when sequentially placed in the blanks of the given letter series will complete the series.