The correct option is A hydrolases
Hydrolases are enzymes that catalyse the hydrolysis of their substrates by adding constituents of water (hydrogen and hydroxyl groups). Digestive enzymes belong to this group. For example - lactase, maltase, amylase, protease, etc.
Isomerases are the enzyme that catalyses the reaction in which substrate is converted into its positional or optical isomer by intramolecular rearrangement.
Ligases are the enzymes that catalyze the linking together of compounds utilising energy from ATP.