**Core Concept**
Mumps is a viral infection caused by the mumps virus, primarily affecting the salivary glands near the ears, leading to symptoms like swelling in these areas, fever, headache, muscle aches, tiredness, and loss of appetite. Complications of mumps can involve various body systems.

**Why the Correct Answer is Right**
Complications of mumps include orchitis (inflammation of the testicles), oophoritis (inflammation of the ovaries), pancreatitis, and meningitis. Orchitis is the most common complication in post-pubertal males, while oophoritis is more common in females. The exact mechanism of these complications is not fully understood, but it is thought to be related to the virus's ability to cause inflammation and damage to the affected tissues.

**Why Each Wrong Option is Incorrect**
**Option A:** This option should be a common complication of mumps, such as orchitis or pancreatitis. Without this information, it is difficult to provide a reason why this option is incorrect.

**Option B:** This option could be a common complication of mumps, such as meningitis or pancreatitis. Without further information, it is hard to determine why this option is incorrect.

**Option C:** This option could be a common complication of mumps, such as oophoritis or orchitis. Without further information, it is difficult to provide a reason why this option is incorrect.

**Option D:** This option is likely a common complication of mumps, such as meningitis or pancreatitis. Without further information, it is hard to determine why this option is incorrect.

**Clinical Pearl / High-Yield Fact**
Mumps can cause sterility in males due to the inflammation of the testicles (orchitis). This complication is more common in post-pubertal males and can lead to long-term damage to fertility.

**Correct Answer:** D.