Discharging sinus is seen in -

Ans. is 'd' i.e., Mycetoma . Mycetoma are chronic, slowly progressive infections of the subcutaneous tissue usually of the foot caused by a number of Actinomycetes and filamentous fungi. . The disease usually begins as a small subcutaneous swelling of the foot, which enlarges, burrowing into deeper tissues and tracking to the surface as multiple sinuses discharging viscid, seropurulent fluid containing granules.