20 : 30 : : ? : 72 

Stethoscope: Heartbeat:: ? : Temperature 

Spider: Insect :: Crocodile : ? 

Direction: In the following question, select the related letters from the given alternatives.

Elephant : Howdah :: Horse : ? 

A Which one is odd word in the following
1. Cauliflower 2. Mushroom 3. Carrot 4. Potato 5. Brinjal 

Direction: In the following question, select the related letters from the given alternatives.
Election : Manifesto :: Meeting : ?

Direction: In the following question, select the related letters from the given alternatives.
Fire : Ashes :: Explosion : ? 

Pituitary: Brain :: Thymus : ?