I don't like the answer "just pass enough of the rest of the exam so it doesn't matter if you fall this one." That is doing a disservice to our blind friends.
The point of the question is just to identify what the schematic symbol is for the electrical component. Just describe what you see in basic detail. Especially when we're talking about the Technician exam, these aren't super complex transistors and exotic components we're talking about.
"The component three schematic consists of two parallel lines that are perpendicular to the wire line in and out of it."
"Component four is a solid black triangle with a solid black line at it's point."
"Component five is a zig zag style line."
Being knowledgeable hams, I hope you can recognize I'm describing a capacitor, diode, and resistor.
Alternatively, you can do this question in reverse. Read them each answer choice and ask them to describe what the symbol looks like. If they can clearly answer that at the very least for the correct answer choice, I think it's a fair assumption to say they would recognize it if they were physically able to see it.
Again, we're talking about an accommodation for a blind person to answer a question about what a paper schematic symbol looks like. There's a bit of irony there. As long as you make a good faith effort to give this person a chance to answer without giving the answer away, I don't feel you are committing any ethical violation as an exam proctor, nor are you cheapening the licensing process for anyone else.