Answer : 4. "New copies of the album have been ordered by Shalu."
Explanation :

The given sentence is in the active voice. We have to change the sentence into passive form.
The given sentence is written in 'present perfect tense.'
The structure of these kinds of sentences is:
Active Voice: Subject + have/has + V3 + Object.
Passive Voice: Object + have/has + been + V3 + by (preposition) + Subject.
Let’s see another example:
Active voice: I have written this instruction only for visitors.
Passive voice: This instruction has been written by me only for visitors.
The subject of the given sentence is 'Shalu' and the object of the given sentence is 'new copies of the album.'
So, in the passive voice, the position of ‘subject’ and ‘object’ will be interchanged.
Also here, 'has ordered' will be changed into 'have been ordered'.
Correct Sentence: New copies of the album have been ordered by Shalu.