Possbile Wrong Answer in Barrons' Test Prep

marekmagda86

To prepare for study abroad, exactly five students- M, N, P, R, and T- will learn at least one of four languages: French, Hindi, Italian, and Spanish. No student learns any other language. The following conditions apply:

No student learns all four languages.
At least two of the students learn French.
Any language that is learned by R is not learned by N.
If French is learned by any student, then that student learns Italian.
If Hindi is learned by any student, then that student learns Spanish.
P learns French.

5.) Which one of the following is a pair of languages that CANNOT both be learned by student R?

a. French and Italian
b. French and Spanish
c. Hindi and Italian
d. Italian and Spanish
e. Hindi and Spanish

Book says D. I say B and C are also possible. The only way those answers don't work is if R no longer has to learn the accompanying language with N still does. It DOES say pair which may mean the rules for him can be broken. If true, this is a thinly veiled modifier that I would probably have gotten wrong, possibly i just have to familiarize myself with this test more.