**Felanga**

### Core Concept
Felanga, also known as Felagry's sign, is a clinical sign observed during the examination of the abdomen, particularly in cases of ovarian torsion. It refers to a palpable, tender, and movable mass in the lower abdomen, indicative of an ovarian cyst or mass that has twisted and cut off its blood supply.

### Why the Correct Answer is Right
The correct answer is related to the pathophysiology of ovarian torsion. When an ovarian cyst or mass twists, it cuts off the blood supply to the ovary, leading to ischemia and pain. The palpable, tender, and movable mass observed in the lower abdomen is a result of the twisted ovary and its associated tissues. This sign is often associated with the presence of an ovarian cyst or mass and is a critical finding in the diagnosis of ovarian torsion.

### Why Each Wrong Option is Incorrect
**Option A:** Incorrect because it does not accurately describe the clinical sign of Felanga. While a palpable mass may be present in cases of ovarian torsion, the description of Felanga does not include the term "mass."

**Option B:** Incorrect because it refers to a different clinical finding altogether. The "sentinel loop" is a radiographic sign observed in cases of small bowel obstruction, not ovarian torsion.

**Option C:** Incorrect because it is a type of ovarian tumor, not a clinical sign. While ovarian tumors may be associated with the clinical sign of Felanga, the sign itself is not a tumor.

**Option D:** Incorrect because it is a surgical approach, not a clinical sign. The "Laparoscopic approach" may be used to diagnose and treat ovarian torsion, but it is not a description of the clinical sign of Felanga.

### Clinical Pearl / High-Yield Fact
It's essential to recognize the clinical sign of Felanga in cases of lower abdominal pain, as it may indicate ovarian torsion, a surgical emergency that requires prompt intervention.

### Correct Answer: C. Ovarian tumor.