The correct option is
D Acid strength - x > y,
H2O solubility -
y > x,
Volatility -
x > y, Melting point -
y > x
(Ka) = x > y (Carboxylate anion stabilized by H-bonding)
(Sol.) = y > x (Intermolecular H-bonding in y)
(Vol.) = x > y (Intermolecular H-bonding in x)
(MP) = y > x (More symmetrical structure of y)