(a)
The separation of racemic mixture back into $d$ and $l$ isomers is known as resolution. It can be done by
(I) mechanical method
(II) bio-chemical method using enzymes
(III) chemical method (salt formation)
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.