Among the following, `L-` serine is

Options

A.
B.
C.
D.

Answer

c

Explanation

A rule of thumb for determining D/L isomeric form of an amion acid is the corn rule.
The groups, `COOH, R , NH_(2)` and H (where R is an unnamed carbon chain) are arranged around the chiral centra carbon atom. Sighting from the hydrogen atom. if these groups ar arranged counter- clockwise around the carbon atom. then it is the D-form. If clockwise. it is the L-from. Accroding to priority order `NH_(2)--COOH-CH_(2)OH-H`