Answer:
Membranophone is the answer. we had learned it
The situation with the professor and the student could be due to personality disorder.
<h3>What is delusional disorder?</h3>
A person suffering form delusional disorder can view what is right to be wrong.
The person at a time sees himself as the only right person based on the imagination of his mind.
The person can act very normal most times even with the disorder.
Therefore, The situation with the professor and the student could be due to personality disorder such as delusional disorder.
Learn more about delusional disorder here,
brainly.com/question/7295797
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