A) liquid\[C{{O}_{2}}\]
B) liquid \[{{O}_{2}}\]
C) liquid \[{{N}_{2}}\]
D) ice
Correct Answer: C
Solution :
Semen is stored in semen banks for artificial insemination or artificial breeding, e.g.. Bull semen is stored at-196°C temperature. This temperature is obtained by liquid\[{{N}_{2}}\]. Deep freezing is used for keeping seven day old embryos for several years. Deep freezing is also done at-196°C (temperature of liquid \[{{N}_{2}}\]).
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