Answer:
The correct answer would be alpha amylase.
Alpha enzyme is an enzyme that catalyzes the break down of alpha linkage present in polysaccharides such as starch, glycogen et cetera.
The help in breaking down complex polysaccharides into simpler units which can be easily absorbed by the body.
For example, alpha amylase is present in the form of salivary amylase and pancreatic amylase in humans. They breakdown the starch into smaller units such as maltose and dextrin.
In contrast, oligo-1,6-glucosidase is an enzyme that catalyzes the breakdown of alpha 1-6 linkage in some oligsaccharides.
Thus, the organism would miss alpha amylase more as compared to oligo-1,6-glucosidase.