Choose the best one-word substitute for: “a collection of aircraft.”

Explanation

The correct option is (a). The correct option is (a) Squadron. The word “squadron” refers to an organized group or unit of aircraft, especially in the air force; it is a standard collective term used for aircraft in military or aviation contexts (Hindi meaning: विमान-दल / स्क्वाड्र न). It precisely matches the idea of “a collection of aircraft” as a formal group. Example: A squadron of fighter jets flew over the city during the parade. Meanings of the given other options: Option B: Crowd – a large number of people gathered together (भीड़). Option C: Cluster – a group of similar things close together, often used for objects like stars, grapes, or flowers (गुच्छा/समूह). Option D: Pack – a group of animals (especially wolves/dogs) or a bundle of items (झुंड/पैक). So the correct answer is (a)