This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Testis & Scrotum, Subject name: Surgery
Which is a feature of filarial epididymo orchitis? 
Select and explain. 
A. Absence of involvement of seminal vesicles on PR, B. Eosinophilia, C. Microfilaria in blood, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: Ans: d (All of the above) Ref:S. Das, p. 459- Filarial epididymo orchitis is quite common and subacute in nature.- Usually affects the globus major of the epididymis.- Gradually testis is involved.- Secondary hydrocoele is not uncommon.Thberculous epididymitisCraggy epididymis leading to softening.Filarial epididymo-orchitisPresence of a history of periodic feverAbsence of craggy epididymisFormation of cold abscess sinusAbsence of involvement of the seminal vesicles on rectal examinationPresence of eosinophiliaDemonstration of microfilaria in peripheral blood