Identify A and B in the following reaction
`C_(2)H_(5) - Cl overset(A)rarr C_(2)H_(5) OH overset(B)leftarrow C_(2)H_(5)Cl`
A. A = aqueous KOH, B = moist `Ag_(2)O`
B. A = alcoholic KOH, B = aqueous NaOH
C. A = aqueous NaOH, B `= AgNO_(2)`
D. `A = AgNO_(2), B = KNO_(2)`