Choose the odd word/letters/number/number pair from the given alternatives.

A series is given with one term missing. Choose the correct alternative from the given ones that will complete the series.

Double,Triple,Quadruple, ?

In a certain code language, "RIVER" is written as "12351" and "RED" is written as "156". How is "DRIVER" written in that code language?

Identify the diagram that best represents the relationship among the given classes.

Earth, Saturn, Planet, Star

Which drug is used as an Anti-Anxiety drug?

Vacuum Tubes were used by _________ Generation of Computers.

Methane an air pollutant is produced ______.

Chandragupta Maurya was an ardent follower of __________.