**Core Concept**
The incubation period of mumps is the time between exposure to the mumps virus and the onset of symptoms. Mumps virus is a paramyxovirus that primarily affects the salivary glands near the ears, leading to symptoms such as swelling in these areas, fever, headache, and muscle aches.

**Why the Correct Answer is Right**
The correct incubation period of mumps is typically between 16 and 18 days, with a range of 12 to 25 days. This duration is crucial for public health measures, such as contact tracing and quarantine. The correct answer, **2-3 weeks**, accurately reflects this range. The virus is highly contagious during this period, and prompt recognition of symptoms is essential for preventing further transmission.

**Why Each Wrong Option is Incorrect**
**Option A:** This option underestimates the typical incubation period of mumps, which is generally longer than 1-2 weeks.
**Option C:** This option overestimates the typical incubation period of mumps, which is generally shorter than 3-4 weeks.
**Option D:** This option further overestimates the typical incubation period of mumps, which is not typically longer than 4-5 weeks.

**Clinical Pearl / High-Yield Fact**
Mumps is primarily spread through respiratory droplets, such as those produced by coughing or sneezing, making it essential to practice good hygiene, including frequent handwashing and avoiding close contact with infected individuals.

**✓ Correct Answer: B. 2-3 weeks**