Question
Among the following, $L-$ serine is

Answer

c
Serine is an amino acid its structure is $\begin{array}{*{20}{c}}
  {HO - C{H_2} - CH - COOH} \\ 
  {\,\,|} \\ 
  {\,\,\,\,\,\,\,\,\,\,N{H_2}} 
\end{array}$ As per exchange rule $L-$

serine is (figure)

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