Correct option is (A) Blue. This is because, excess NaOH neutralises acid and then makes litmus blue as it is a base.

Correct option is (D) Ethyl ethanoate (ester). The reaction is esterification.

C2H5OH + CH​3COOH $\stackrel{{H}^{+}}{\to }$ CH3COOC2H5

CH​3COOH + NaOH $\to$ CH3COONa + H2O
CH3COONa  + NaOH + CaO $\to$ CH4 + CO2