An Optically active compound, Y, with the molecular formula C7H12 gives a positive test with cold dilute KMnO4 and shows IR absorption at about 3000 cm^-1. On catalytic hydrogenation, Y yields Z(C7H16) and Z is also optically active. Which is a possible structure for Y?
A. CH3CH2CH2CH2CH2C(triple bond)CH
B. (CH3)2CHCH2CH2C(triple bond)CH
C. CH3CH2CH(CH3)CH2C9(triple bond)CH
D. CH3CH2CH(CH3)C(triple bond)CCH3
E. CH2=CHCH(CH3)CH2CH=CH2