Select the option that expresses the given sentence in passive voice.

Tell her to finish the work.

Let her be told to finish the work.

The correct option that expresses the given sentence in passive voice is Let her be told to finish the work.

The other options are incorrect because:

• Tell her to finish the work is in the active voice.
• Let she finish the work is grammatically incorrect. The subject of the sentence is "she," which is a third person singular pronoun. The verb "let" requires a subject that is a first or second person pronoun.
• To finish the work be told to her is grammatically incorrect. The verb "to be" is followed by a past participle, but the verb "to finish" is not a past participle.
• The work is to be finished by her is in the passive voice, but it does not use the modal verb "let."