Answer:
The correct answer would be B) nuclei of gland cells.
Starch is a polysaccharide which is digested with the help of salivary amylase and pancreatic amylase in humans.
Enzymes are protein in nature and thus they must be translated from a particular gene. Genes are made up of DNA, nucleotide sequence of which is used as the blueprint for the synthesis of any protein.
This gene would be expressed in the cells of the salivary gland and pancreatic gland.
Thus, the blueprint of this enzyme can be found in the nuclei of gland cells.