Correct option (a) hydrolytic enzymes
Explanation:
Lysosomes or suicidal bags are filled with about 40 types of acid hydrolases (drgestive enzymes) like acid proteases, acid nucleases, acid phosphatases, acid sulphatases, acid lipases, acid glycosidases working at an optimum pH ≤ 5 for controlling intracellular digestion of macromolecules.