**Core Concept**
Asthma severity is classified based on symptom frequency, nocturnal symptoms, and impact on daily life, using standardized guidelines such as GINA (Global Initiative for Asthma). The classification helps determine appropriate therapy and management strategies.

**Why the Correct Answer is Right**
The patient experiences asthma symptoms at least 4 days per week and has nocturnal symptoms 2–3 times per month. This pattern aligns with **mild persistent asthma**, where symptoms are frequent but not constant, and nighttime symptoms occur occasionally. According to GINA, mild persistent asthma requires regular controller medication (e.g., inhaled corticosteroids) to prevent exacerbations and maintain control.

**Why Each Wrong Option is Incorrect**
Option A: Severe persistent asthma involves daily symptoms, frequent nocturnal awakenings, and significant limitation of activity — not present here.
Option C: Intermittent asthma has symptoms only a few times per week and no nocturnal symptoms — this patient has more frequent symptoms and nighttime awakenings, so it is too mild.
Option D: Moderate persistent asthma includes symptoms more than twice a week, daily symptoms, and nightly symptoms at least once a week — the patient’s symptoms are less frequent and less severe than this threshold.

**Clinical Pearl / High-Yield Fact**
Nocturnal symptoms ≥ 2–3 times/month are a key feature of mild persistent asthma; if they occur weekly or more, it may indicate progression to moderate or severe disease. Always assess symptom frequency and timing to guide therapy.

✓ Correct Answer: B. Mild persistent Asthma