Answer:
Option B, Submucosa, because this layer absorbs nutrients from the bloodstream
Explanation:
If a person is eating regularly then it is pretty much sure there is no case of “eating less food” that could have caused malnutrition. Hence, the problem of malnutrition has occurred due to some functional issues such lack of proper exchange of food resources through the alimentary canal.
The sub-mucosal layer of alimentary canal is responsible for sharing the food nutrient by pouring it in blood.
Thus, option B is correct.