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B
Psychobiology
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C
Kalology
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D
Dermatology
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Solution
The correct option is B Gerontology Gerontology is the study of the social, cultural, psychological, cognitive, and biological aspects of ageing. In gerontology, Geron means "old man" and logy means "study of".The field is distinguished from geriatrics, which is the branch of medicine that specializes in the treatment of existing disease in older adults. Hence, the branch of biology dealing with ageing is gerontology.