Rearrange the parts in correct order to make a meaningful sentence.
(A) who first said
(B) it was Copernicus
(C) round the sun
(D) that the earth revolves

Correct option is A

Option (a) is the correct order of the given sentence.
• The sentence should start with the main clause: “It was Copernicus …” because it clearly introduces the subject (Copernicus).
• “who first said” is a relative clause that immediately follows the person (Copernicus).
• Then the content of what he said is introduced by “that …”.
• “round the sun” completes the meaning of “revolves” and comes at the end.
Correct sentence formed:
It was Copernicus who first said that the earth revolves round the sun.