Rearrange the parts in correct order to make a meaningful sentence.
(A) entering a house
(B) saw a burglar
(C) when the policeman
(D) he ran and caught him

Correct option is C

Correct order: (c) CBAD
Correct sentence formed: When the policeman saw a burglar entering a house, he ran and caught him.
Important points:
• (C) “when the policeman” introduces the time clause, so it comes first.
• (B) completes the main meaning: “saw a burglar”.
• (A) explains what the burglar was doing: “entering a house”.
• (D) gives the result/action: “he ran and caught him”.
Hence, option (c) is the correct answer.