Answer:
B. Lysosomes are acidic because they contain acid hydrolases.
Explanation:
Lysosomes are small cell organelles that float outside nucleus. Lysosomes are present in the cytosol of the cells.
Lysosomes are acidic in nature having pH below 5 because of proton pumping through the plasma membrane to maintain this acidic pH.
This acidic nature of lysosomes play a role in fight against diseases.
Hence, the correct option is "B".