In which of the following reaction, regioselectivity can be observed ?
A. `CH_(3)-underset(underset(H)|)overset(overset(CH_(3))|)(C)-CH_(2)-Cloverset(alc. KOH//Delta)rarr`
B. `CH_(3)-underset(underset(Cl)|)overset(overset(CH_(3))|)(C)-CH_(3)overset(alc. KOH//Delta)rarr`
C. `CH_(3)-underset(underset(Cl)|)overset(overset(CH_(3))|)(C)-CH_(2)-CH_(3)overset(alc. KOH//Delta)rarr`
D. `CH_(3)-underset(underset(CH_(3))|)overset(overset(CH_(3))|)(C)-CH_(2)-Cloverset(alc. KOH//Delta)rarr`
