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Tonsils and adenoids are
(A) Lymph nodes
(b) Connectivity tissue with blood supply
(c) Endocrine glands
(d) Small organs specialized to produce endorphins

Answer
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Hint: They are kidney-shaped, a small-sized structure that is found throughout the body and is related to the immune system of the body as it consists of white blood cells but is mostly located in the neck region.

Complete step by step answer:
Tonsils and adenoids are examples of lymph nodes. Lymph nodes are the organs that constitute the lymphatic system. The lymph nodes are joined to the whole body with the help of the lymphatic vessels just as the blood vessels connect the blood to the whole body.
Additional information:
- The tonsils are the lymphatic organs that are located in the aerodigestive tract.
- The aerodigestive tract called Waldeyer’s tonsillar ring consists of various types of tonsils called two palatine tonsils, two lingula tonsils, and two adenoid tonsils.
- They are found to be located in the back region of the throat between the oropharynx and the nasopharynx.
- The main function of the tonsil is to act as a defense system of the immune system when any foreign particle is inhaled.
- The adenoid tonsils are the nasopharyngeal or pharyngeal tonsils that are the most important type of tonsils among all.
- It is located in the nasal cavity or nasopharynx region of the throat.
So, the correct answer is ‘Lymph nodes’.

Note: In 1543, the tonsils were first described by Versalius in detail along with the sanguine irritation. Later Wilhelm Von Waldeyer in the nineteenth century gave a detailed description of the anatomical and histological aspects of the tonsils. In 1661 the adenoid was first observed by Conrad Victor Schneider. The term adenoid referred to the abnormal growth of the tonsils of the pharyngeal region, also called adenoid hypertrophy.