For the following questions answer them individually
Video : Cassette :: Computer : ?
Glucometer : Blood Sugar :: Sphygmomanometer : ?
Behaviour: Psychology :: Plant : ?
Mitochondria : Energy :: DNA : ?
Desert: Mirage ;: Ocean : ?
525 : 25 :: 315 : ?
In each of the following questions, find the odd word/number/letters/number pair from the given alternatives.