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Question
Purification involves which of the following techniques?
i. Crystalization
ii. Ultrasonication
iii.
Chromatography 
iv. Formulation
 
Options:
A .  i and ii
B .  ii and iii
C .  iii and iv
D .  i and iii
Answer: Option D
:
D
Purification is the last step in downstream process where the product is obtained in its purest form.Crystalization and chromatography are two techniques used routinely for purification. Formulation involves developing combinations of the purified product for final usage.

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