Institution: Directorate of Primary Education - DPE Exam: Primary Exam Question Solution 31-05-2019
Topic: Voice, Subject: English Grammar (ইংরেজি গ্রামার)

Best Answer Explained in Below-:

The question "Who is creating this mess?" is in the active voice, indicating that the subject (who) is performing the action (creating). To change this to the passive voice, we need to focus on the object of the action—“this mess”—and place it at the forefront of the sentence.

In the passive voice, the structure generally follows the formula: "object + form of 'to be' + past participle + by + subject." The correct transformation involves recognizing that "this mess" becomes the subject in the passive construction.

Among the options given:

- **A) Who has been created this mess?** is incorrect because it improperly uses "has been" and suggests that "who" is the subject when "this mess" should be.

- **B) By whom has this mess been created?** is grammatically correct but implies a completed action rather than an ongoing one; it suggests the mess was created at some point in the past.

- **C) By whom this mess is being created?** lacks the proper auxiliary verb "is" to form a question, making it incorrect.

- **D) By whom is this mess being created?** is the best choice. It correctly positions "this mess" as the subject, uses "is" to indicate the present tense, and employs "being" to reflect an ongoing action. The use of "by whom" correctly maintains the focus on the agent, aligning with the original question's intent. Thus, D effectively conveys that the mess is currently being created by an unidentified person.