**Core Concept**
The patient's presentation with a non-reducible swelling in the inguinal area, tenderness, and absence of cough impulse suggests a diagnosis related to hernia, specifically indirect inguinal hernia, which occurs when tissue, such as part of the intestine, protrudes through a weak spot in the abdominal muscles.

**Why the Correct Answer is Right**
The absence of cough impulse rules out a hernia that is reducible, which is typically seen in cases of hernia where the contents can be pushed back into the abdominal cavity. In this case, the non-reducible swelling indicates that the hernia is incarcerated or strangulated, which is a medical emergency. The patient's symptoms, such as pain in the inguinal area and lower abdomen, are consistent with this diagnosis. The indirect inguinal hernia occurs due to a congenital weakness in the posterior wall of the inguinal canal, which allows the intestine to protrude through the inguinal ring.

**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect as it does not provide a specific diagnosis related to the patient's presentation.
* **Option B:** This option is incorrect as it does not account for the patient's symptoms and physical examination findings.
* **Option C:** This option is incorrect as it is a type of hernia that occurs in the femoral region, which is not consistent with the patient's presentation.

**Clinical Pearl / High-Yield Fact**
It is essential to note that a non-reducible swelling in the inguinal area, especially in a young male, should raise suspicion for an indirect inguinal hernia. A thorough physical examination, including the absence of cough impulse, is crucial in making an accurate diagnosis.

**Correct Answer:** C.