**Core Concept**
Status asthmaticus is a severe, life-threatening asthma exacerbation that requires immediate medical intervention. Management of status asthmaticus involves administering medications that quickly relax bronchial smooth muscles, reduce inflammation, and improve lung function. The goal is to restore adequate oxygenation and ventilation.

**Why the Correct Answer is Right**
Montelukast is a leukotriene receptor antagonist used as a long-term control medication for asthma. It works by blocking the action of leukotrienes, which are substances in the body that can trigger asthma symptoms. However, in the setting of status asthmaticus, rapid-acting bronchodilators and anti-inflammatory agents are needed to quickly alleviate symptoms. Montelukast is not effective in this acute setting and would not provide the necessary quick relief.

**Why Each Wrong Option is Incorrect**
**Option A:** Magnesium sulphate can be used in the management of status asthmaticus as it has bronchodilatory properties and can help to relax bronchial smooth muscles.
**Option C:** Corticosteroids are essential in the management of status asthmaticus as they reduce inflammation and prevent further exacerbation of symptoms.
**Option D:** Adrenaline (epinephrine) is a rapid-acting bronchodilator that can be used in the management of status asthmaticus to quickly alleviate symptoms.

**Clinical Pearl / High-Yield Fact**
In the setting of status asthmaticus, the initial treatment should focus on administering oxygen, administering bronchodilators such as adrenaline or salbutamol, and starting corticosteroids to reduce inflammation.

**Correct Answer:**
✓ Correct Answer: B. Montelukast