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B
Etiology
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C
Traumatology
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D
Trichology
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Solution
The correct option is A Etiology
Teratology is the branch of medicine in which the study of birth defects and abnormalities. Traumatology is the branch of surgery that deals with patients who suffered physical trauma, as well as accident. Trichology is the study of the hair and all problems related to them. Etiology is the study of the cause or origin of the disease. Thus, the correct option is B.