The correct answer is A. He ordered Ravi to leave the room at once.
The sentence “Leave the room at once Ravi”, he shouted, is an imperative sentence. Imperative sentences are used to give orders, commands, or instructions. In this case, the speaker is ordering Ravi to leave the room immediately.
The other options are incorrect because they do not accurately reflect the meaning of the sentence. Option B, “He forbade Ravi to leave the room at once”, is incorrect because a prohibition is a negative command, while the speaker in this sentence is giving a positive command. Option C, “He suggested that Ravi should leave the room at once”, is incorrect because a suggestion is a polite request, while the speaker in this sentence is giving a direct order. Option D, “He requested Ravi to leave the room at once”, is incorrect because a request is a polite entreaty, while the speaker in this sentence is giving a forceful command.