Question
What is cryopreservation? Give its one use.
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OR
Name the hormonal composition of the oral contraceptive used by human females. Explain how does it act as contraceptive?
| S.No. | Type of barrier | Example of the barrier | Function |
| (і) | А | B | Prevent microbial growth |
| (ii) | C | Polymorpho nuclear leucocytes | D |
| (iii) | Cytokine | E | F |