Which Indian airport became the busiest single runway airport in the world, handling on average one flight every 65 seconds?

Introduction / Context:
Air traffic statistics are a popular topic in general knowledge because they show the scale of infrastructure usage in major cities. The distinction of being the busiest single runway airport in the world is significant, especially when it involves handling one flight every 65 seconds on average. This question asks which Indian airport earned that record, highlighting the operational capacity of its single runway facility.

Given Data / Assumptions:

• The record concerns a single runway airport, not airports with multiple runways.
• The figure mentioned is one flight every 65 seconds on average.
• The options include Chennai, Mumbai (Chhatrapati Shivaji International Airport), New Delhi, and Bengaluru airports.
• We assume the record was noted for a particular fiscal year when the airport overtook another major single runway airport globally.

Concept / Approach:
The concept involves understanding that Mumbai's Chhatrapati Shivaji International Airport traditionally operated with a very busy single runway configuration, managing intense levels of air traffic. News reports highlighted that it became the world's busiest single runway airport, surpassing airports like Gatwick in London, by handling hundreds of flights per day and averaging one flight every 65 seconds. The approach is to recall this fact and match it with the correct answer option.

Step-by-Step Solution:
Step 1: Focus on the phrase “single runway airport” which immediately narrows the field.Step 2: Remember that Mumbai's Chhatrapati Shivaji International Airport maintained a very heavy schedule with limited runway infrastructure.Step 3: Recall news that stated it handled around eight hundred or more flight movements in a day, amounting to roughly one flight every 65 seconds.Step 4: Check the options and confirm that Chhatrapati Shivaji International Airport, Mumbai, is listed.Step 5: Select this airport as the correct answer.

Verification / Alternative check:
You can verify this by remembering that Delhi's Indira Gandhi International Airport uses multiple runways and therefore does not fit the “single runway” description. Bengaluru and Chennai also have their own operations, but Mumbai's airport was singled out in reports for its record setting single runway traffic density. This cross checking confirms that the record mentioned belongs to Mumbai's Chhatrapati Shivaji International Airport.

Why Other Options Are Wrong:
Option A (Chennai International Airport) is incorrect because it does not hold the record for being the busiest single runway airport with one flight every 65 seconds. Option C (Indira Gandhi International Airport, New Delhi) is a multi runway airport and therefore does not match the “single runway” condition. Option D (Kempegowda International Airport, Bengaluru) is growing rapidly but has not been reported for this specific global record in single runway operations.

Common Pitfalls:
A recurring mistake is to choose Delhi simply because it is a larger hub overall, without considering that it uses more than one runway. Another pitfall is to ignore the “single runway” detail and answer based on passenger numbers alone. Candidates should train themselves to pay close attention to qualifiers such as “single runway” and the specific flight per second figures when answering such questions.

Final Answer:
The correct answer is Chhatrapati Shivaji International Airport, Mumbai, which became the world's busiest single runway airport with one flight every 65 seconds on average.