J. B. Dunlop is famous for inventing which important transport related item?

Introduction / Context:
Pneumatic rubber tyres are essential for comfortable and efficient road transport. This question asks about J. B. Dunlop, whose name is widely associated with the development and popularisation of the pneumatic rubber tyre for bicycles and later motor vehicles. Being able to link Dunlop with the tyre is a standard requirement in inventions and discoveries sections of general knowledge.

Given Data / Assumptions:
• The inventor named is J. B. Dunlop.
• Options are airplane, car, rubber tyre, and rubber boot.
• The question focuses on one specific transport related item rather than entire vehicles like the car or airplane.

Concept / Approach:
The right approach is to recall that Dunlop worked on improving comfort for his son's bicycle by creating an air filled rubber tyre. This design evolved into the pneumatic rubber tyres used widely in transport. He did not invent the car or airplane. Rubber boots are a different kind of product and are not normally linked to his name. Therefore, the best match between Dunlop and a transport related invention is the rubber tyre.

Step-by-Step Solution:
Step 1: Focus on Dunlop and think of what appears on many tyres today, where the brand name Dunlop is printed.
Step 2: Recall that Dunlop improved the idea of air filled rubber tyres, first for bicycles and then for other vehicles.
Step 3: Recognise that he did not design complete vehicles like airplanes or cars.
Step 4: Observe that rubber boots are protective footwear, which is not the famous invention linked to his name.
Step 5: Conclude that rubber tyre is the correct choice and fits both the name and the transport context.

Verification / Alternative check:
A quick verification is to remember how tyre companies often carry the Dunlop name and how history of transport sources mention him as an early developer of the pneumatic tyre. No aviation or automobile history text presents him as the inventor of the airplane or the car. Rubber boots are associated with other manufacturers. These cross checks confirm that rubber tyre is the right answer.

Why Other Options Are Wrong:
The airplane was developed by pioneers such as the Wright brothers, not Dunlop. The car grew out of work by many inventors including Karl Benz and others. Rubber boots were made earlier and are not linked in basic GK books to Dunlop as a key invention. Therefore, airplane, car, and rubber boot are distractors that do not match the known historical association of Dunlop with the pneumatic rubber tyre.

Common Pitfalls:
The main pitfall is simple guesswork if a student does not clearly remember Dunlop. Another issue is confusion between tyre brands and car makers. To avoid mistakes, students should remember a short phrase that Dunlop equals tyre and Benz equals car. Building similar simple associations for other inventors greatly improves accuracy on inventions questions and turns them into high scoring parts of the exam.

Final Answer:
J. B. Dunlop is famous for inventing the rubber tyre.