Extra cellular digestion occurs in :

Explanation

Do you know what protozoans are? Yes, you do! They are single-cell organisms, just think if they are single-celled, why will they do extracellular digestion? They will digest inside the cell. So by reduction method A, C, and D options are wrong because they all contain protozoan, so no need to go deep(save time). Extracellular digestion refers to special molecules breaking down food for molecules outside the cell, contrasted by intracellular digestion which happens inside the cell. Intracellular digestion mainly occurs in unicellular organisms such as protozoans. In addition, extracellular digestion occurs in animals with a digestive system and fungi.