There is certain relationship between two given words on one side of : : and one word is given on another side of : : while another word is to be found from the given alternatives, having the same relation with this word as the given pair has. Select the best alternatives/ relationship.

Contamination : Food :: Infection : ?

If Deplete : Exhaust then Replenish : ___

In the following question, select the related letter pair from the given alternatives.

APX : BQY : : ? : ?

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

43 : 27 : : ? : ?

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

River : Krishna : : ? : ?

If Quarantine : Isolation, then Freedom : ___

In the following question, select the related letter/letters from the given alternatives.

ACE : KMO : : BDF : ?

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

13 : 23 : : 37 : ?

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

Circumference : Circle : : ? : ?