Final answer:
Option A identifies the three sets of tonsils: Palatine, Lingual, and Pharyngeal. These are part of the lymphatic system, which aids in immune response, particularly in children, by eliminating pathogens.
Step-by-step explanation:
The Three Sets of Tonsils
The student has asked which groups constitute the three sets of tonsils. The correct answer is A. Palatine, Lingual, and Pharyngeal tonsils. These are part of the lymphatic system and play a role in the body's immune function. The palatine tonsils are located on either side of the throat, the lingual tonsils are found beneath the tongue, and the pharyngeal tonsils, also known as adenoids when swollen, are located in the back of the nasal cavity. These structures are involved in the body's immune responses, particularly in childhood, to help recognize and eliminate pathogens.
The other options list a mixture of other types of tissues or glands. Option B includes the adenoid, which is another name for the pharyngeal tonsil only when it's swollen, but also lists two salivary glands (Sublingual and Parotid), which are not tonsils. Option C lists organs and glands (Submandibular gland, Thyroid gland, and Spleen), again not tonsils. Option D incorrectly lists bones of the skull (Occipital, Parietal, and Temporal), which have nothing to do with lymphatic tissue.