Sentence Correction - Verbal and Reasoning

Directions to SolveWhich of phrases given below each sentence should replace the phrase printed inboldtype to make the grammatically correct? If the sentence is correct as it is, mark 'E' as the answer.
Q1:

The moment the manager came to know fraudulent action of his assistant, he order immediately dismissed him.

A immediately ordered his dismissed

B ordered his immediate dismissal

C immediately order dismissal of his

D ordered for immediately dismissal of him

E No correction required

ANS:B - ordered his immediate dismissal

No answer description is available.