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Rearrange the given parts to form a meaningful sentence:

(A) practical demonstration clarified their doubts

(B) in great detail, the students struggled to grasp

(C) although the professor explained the complex theories

(D) the underlying concepts until the

Choose the correct answer from the options given below:

Solution

✅ Correct Option: 4

Option 1: (B), (C), (D), (A) -> Creates a disjointed sentence with improper flow and unclear meaning.

Option 2: (C), (A), (B), (D) -> Results in incomplete structure with "until the" left hanging at the end without proper conclusion.

Option 3: (B), (A), (D), (C) -> Produces a grammatically incorrect sentence with "although" awkwardly placed at the end.

Option 4: (C), (B), (D), (A) -> Forms the complete sentence: "Although the professor explained the complex theories in great detail, the students struggled to grasp the underlying concepts until the practical demonstration clarified their doubts" - grammatically correct with proper logical flow.


Hence, Option 4: (C), (B), (D), (A) -> This arrangement creates a coherent complex sentence that begins with a dependent clause ("Although..."), shows contrast between theoretical explanation and practical understanding, and concludes with the resolution that clarified the students' doubts -> correct

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