< b="" />Answer: < />

To determine which vehicle will take less time to reach Mumbai from Delhi, we need to consider the speed and distance covered by each mode of transportation.

< b="" />1. Aeroplane: < />
- An aeroplane is the fastest mode of transportation.
- It can cover the distance between Delhi and Mumbai in a relatively short time.
- The average flight time from Delhi to Mumbai is around 2 hours.

< b="" />2. Train: < />
- Trains are a popular mode of transportation in India.
- However, trains generally take longer than aeroplanes to cover long distances.
- The journey from Delhi to Mumbai by train can take approximately 16-24 hours, depending on the type of train and the route.

< b="" />3. Bus: < />
- Buses are a common mode of transportation for shorter distances.
- However, for long-distance travel from Delhi to Mumbai, buses take a significant amount of time.
- The journey by bus can take approximately 24-36 hours, depending on the route and the number of stops.

< b="" />4. Car: < />
- Cars provide flexibility and comfort but are not as fast as aeroplanes.
- The distance between Delhi and Mumbai is approximately 1,400 kilometers, and travelling by car can take around 24-30 hours, depending on the speed and breaks taken during the journey.

Therefore, based on the information provided, the correct answer is < b="" />option 'A' - An aeroplane< />. An aeroplane will take the least amount of time to reach Mumbai from Delhi, usually around 2 hours, compared to the other modes of transportation.

An aeroplane