Final answer:
The correct answer to the question about the two types of salivary glands with two types of secretory cells is a) Parotid and submandibular glands. The parotid glands secrete watery saliva with amylase, and the submandibular glands produce a mixture of watery and mucus saliva with amylase.
Step-by-step explanation:
The student's question asks about the two types of salivary glands consisting of two types of secretory cells. Salivary glands are classified into three major categories: the parotid glands, the submandibular glands, and the sublingual glands. The parotid glands produce a watery saliva rich in amylase, whereas the submandibular glands produce a mixture of watery and mucus saliva also containing amylase. The sublingual glands mostly secrete mucous and produce the thickest saliva with the least amount of salivary amylase. Based on the functions of these glands, the correct answer to the question, which asks for the two types of glands consisting of two types of secretory cells, is option a) Parotid and submandibular glands.