Change the voice : Who is creating this mess?
Who has been created this mess?
By whom has this mess been created?
By whom this mess is being created?
By whom is this mess being created?
Correct
Explanation:
Correct Answer is: By whom is this mess being created?
Who যুক্ত interrogative বাক্য present continuous tense –এ হলে এর passive voice-এর Structure : By whom + am/ is/ are + object কে Subject + being + Verb-এর Past Participle + question mark.