Given below are two statements: 

Assertion (A): Glycine must be taken through diet.
Reason (R): It is an essential amino acid.
   
1. Both (A) and (R) are True and (R) is the correct explanation of (A).
2. Both (A) and (R) are True but (R) is not the correct explanation of (A).
3. (A) is True but (R) is False.
4. Both (A) and (R) are False.
Hint: Glycine is a non-essential amino acid
The amino acids, which can be synthesized in the body, are known as non-essential amino acids. On the other hand, those which cannot be synthesised in the body and must be obtained through diet, are known as essential amino acids
Glycine must not be taken through diet because it can be synthesized in our body and non-essential amino acid.