The correct option is D Mycobacterium
Leprosy is an infectious disease that causes severe, disfiguring skin sores and nerve damage in the arms and legs. Leprosy is caused by a slow-growing type of bacteria called Mycobacterium leprae (M. leprae). Leprosy is also known as Hansen's disease. Leprosy primarily affects the skin and the nerves outside the brain and spinal cord, called the peripheral nerves. It may also strike the eyes and the thin tissue lining the inside of the nose. It usually takes about 3 to 5 years for symptoms to appear after coming into contact with the leprosy-causing bacteria.