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Pollen grains can be stored for several ...

Pollen grains can be stored for several years in liquid nitrogen having a temperature of
(A) `-160^(@)C`
(B) `-120^(@)C`
(C) `-196^(@)C`
(D) `-80^(@)C`

A

`0^(@)C`

B

`37^(@)C`

C

`100^(@)C`

D

`-196^(@)C`

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