This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous (Testis & Scrotum), Subject name: Surgery
A patient of 18 years of age presents with sudden agonising pain in the groin and the lower abdomen. The patient feels nausea and gives a history of vomiting. On physical examination, the testis seems high. The cremasteric reflex is lost. What is the most possible cause? 
Select and explain. 
A. Epididymo-orchitis, B. Mumps orchitis, C. Idiopathic scrotal edema, D. Testicular torsion
D: Testicular torsion
Answer: D: Testicular torsion 
Explanation: Ans. (d) Testicular torsion.Testicular torsion is most common between 10 and 25 years of age, although a few cases occur in infancy. Typically, there is sudden agonising pain in the groin and the lower abdomen. The patient feels nauseated and may vomit. Torsion of a fully descended testis is usually easily recognized. The testis seems high and the tender twisted cord can be palpated above it. The cremasteric reflex is lost.Image source- style="font-family: Times New Roman, Times, serif">