Select the option that expresses the given sentence in passive voice.Who is looking for a smart advisor?

The given interrogative sentence is in the Present Continuous Tense active voice: $\text{"Who"}+\text{is/am/are}+\text{Verb-ing}+\text{for}+\text{Object?}$ Rules for conversion to passive voice:"Who" changes to "By whom".Present Continuous active $(\text{is looking})$ changes to Present Continuous passive $(\text{is/am/are}+\text{being}+\text{looked})$.The preposition "for" must remain attached to the verb phrase ("looked for").The structure becomes: $\text{By whom}+\text{is/am/are}+\text{New Subject (a smart advisor)}+\text{being}+{\text{Verb}}_3\text{ (looked) for?}$ Thus, the correct passive sentence is: "By whom is a smart advisor being looked for?" (Option D).