Two statements are given below :
Statement I : The melting point of monocarboxylic acid with even number of carbon atoms is higher than that of with odd number of carbon atoms acid immediately below and above it in the series.
Statement II : The solubility of monocarboxylic acids in water decreases with increase in molar mass.
Choose the most appropriate option :

The melting point of carboxylic acids increases irregularly with molecular weight, producing an $$\mathrm{Alternating\ Effect}$$.

Carboxylic acids containing an even number of carbon atoms possess higher melting points than the adjacent odd-numbered homologues.

This occurs because even-numbered carbon chains pack more efficiently in the crystal lattice due to their zig-zag arrangement.

Simple aliphatic carboxylic acids having up to four carbon atoms are miscible in water due to formation of hydrogen bonds with water molecules.

As the number of carbon atoms increases, solubility decreases because the hydrophobic hydrocarbon part becomes larger.

Thus, higher carboxylic acids become practically insoluble in water due to increased hydrophobic interaction of the hydrocarbon chain.

Thus, both statements are correct.