Sentences of a paragraph are given below in jumbled order. Arrange the sentences in the correct order to form a meaningful and coherent paragraph.
A. For centuries, humans have tried to master the art of flight.
B. It was not until the early 20th century that the dream was realised with the invention of the airplane.
C. Despite numerous attempts, many of these efforts ended in failure.
D. Today, aviation is one of the most important modes of transportation.

Correct option is D

Option (d) ACBD is the correct order of the given sentences.
“For centuries, humans have tried to master the art of flight. Despite numerous attempts, many of these efforts ended in failure. It was not until the early 20th century that the dream was realised with the invention of the airplane. Today, aviation is one of the most important modes of transportation.”

Why A → C → B → D is correct

• A (Beginning: topic & time frame): Introduces the long-standing desire (“For centuries…”)—a natural opener that sets scope and topic.

• C (Struggles/elaboration): Follows logically by detailing early outcomes (“Despite numerous attempts… ended in failure”), which elaborates on A and keeps the narrative in the pre-success era.

• B (Turning point): Marks the breakthrough (“not until the early 20th century… invention of the airplane”), resolving the problem set up in C and advancing the timeline.

• D (Present outcome): Concludes with the current impact (“Today, aviation…”)—a standard move from history → result → modern significance.