Why (D4) do you think Pen Pal showed Skander's photographic plate to a doctor at the hospital?
Pen pal showed the photographic plate to a doctor possibly due to following reasons.
First, that he did it out of curiosity and to understand physical and chemical properties of the plate.
Second, he must have faced difficulty in using it, so he must have thought of taking help from a doctor.
Third, he must be afraid of using the plate due to the risk involved because of its chemical properties and the way of clicking a picture that one has to think “ready” to get one’s impression. And it is possible that he might have hurt himself while operating with it.