`Ph-CH_(2)-overset(CH_(2))overset(|)underset((+))CH-OHoverset(TaCl)rarrXoverset(KSH)rarrY:`
A. `X " is "Ph-underset((+))CH_(2)-overset(CH_(3))overset(|)CH-OTs`
B. `X " is "Ph--CH_(2)-underset((-))overset(CH_(3))overset(|)CH-OTs`
C. `Y " is "Ph-underset((-))CH_(2)-overset(CH_(3))overset(|)CH-SH`
D. `Y " is "Ph-underset((+))CH_(2)-overset(CH_(3))overset(|)CH-SH`