This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Biochemistry
Octant rule is related to ? 
Select and explain. 
A. Spectroscopy, B. Chromatography, C. Electroscopy, D. None
A: Spectroscopy
Answer: A: Spectroscopy 
Explanation: Ans. is 'a' i.e., Spectroscopy Ultroviolet visible spectroscopy (UV-sis) can distinguish between enantiomers by showing a distinct cotton effect for each isomer.UV-sis spectroscopy sees only chromophores, so other molecules must be prepared for analysis by chemical addition of a chromophores such as antracene.Two methods are repoed : the octant rule and the excition chirality method.