Assertion (A) . Pent-1-ene and pent-2-ene are position isomers.
Reason (R). Position isomers differ in the position of functional group or a substituent.
A. Both A and R are correct and R is the correct explanation of A
B. Both A and R are correct but R is not the correct explanation of As
C. both A and R are not correct
D. A is not correct but R is correct