Forwarding a student’s question about exam modalities to a professor as a TA? I am currently working as a teaching assistant.

My tasks this semester include writing/putting together a formula sheet containing a lot of formulas and some graphs that the students should not have to memorize.
This sheet will be used in the final exam.

A student recently send an e-mail asking whether he should print it out himself or will be given a copy upon taking the exam. Since I am not responsible for the exam or anything grading-related, this mail should have been addressed to the professor, since I can only guess 
(although I am fairly certain it would not be useful to let students bring the sheets themselves and thus giving them a chance to alter them).

Now how I see it, I have the following options:


Forward the e-mail to my professor. 
Answer the student vaguely, recommending to mail the professor.
Contact the professor; ask him what to do.


I’m unsure whether forwarding this mail would be appropriate. I’d also feel stupid for asking the professor about something that should be obvious.

Which of the outlined possibilities would be the most efficient, yet still appropriate way to go?
You cannot answer this question, so you have to ask the professor.
You do not want to be responsible for the potential confusion caused by a wrong answer.
If your professor already made up their mind, it’s a matter of seconds for them to answer the mail (this is a clear case of this PhD comic).
If not, they need to make up their mind anyway some time, and you were right to redirect the question.

Check that the forwarded mail is concise; otherwise summarise it when forwarding.
Also make sure that the response goes to you as well (include yourself and the student in the reply to field) as you may get further questions along this line.

This does not really apply to this case, but for more complex or exotic questions you can also include a suggested action and rationale and just have it ratified by the professor, e.g.:


  A student asked me whether they should bring a print of the formula sheet or it will be provided. I would guess the latter since it makes it easier for us to control that the sheets have not been tampered with. Can you please confirm or correct this?