WHAT_IS_THE_SELECTIVITY_OF_C4H7CL_RELATIVE_TO_C4H8CL2??$

1.	WHAT_IS_THE_SELECTIVITY_OF_C₄H₇CL_RELATIVE_TO_C₄H₈CL₂??$
A.	0.25
B.	0.50
C.	0.75
D.	1.00
Answer» B. 0.50

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