There of the following four are alike in a certain way and so form a group. Which is the one that does not belong to that group?

24 = 5² - 1 80 = 9² - 1

49 = 7² - 0 15 = 4² -1

(a) ( 2, 2³ + 3 = 11 )
(b) ( 3, 3³ + 3 = 30 )
(c) ( 7, 7³ + 2 = 345 )
(d) ( 5, 5³ + 3 = 128 )

Catalysis : A process of acceleration Chemical Reaction.
Condensation : Conversion of vapour into liquid.
Conduction : Transfer of heat or electricity.
Coagulation : A process of cloting of blood. As coagulation process takes place inside a body.

Googly is odd here, as swing, bouncer and yorker can be done during pace balling. Where as googly can be done only on spin balling.

Elope means to run-away where as rest all are related with respect.

'Swan' does not belong to that group because swan is a water bird while others are not water birds

Except `Aboundance' all mean sufficent amount but aboudance is used for more than sufficient amount.

All others are birds while bat is a mammal.

All others are fire arms.

All others grow on trees , while `Watermelon' grows on creepers.