In which sentence are all words spelled correctly?

In which sentence are all words spelled correctly?
 a. Because of his misterious rash, the nurse will not inoculate Jim but is transferring him to a separate room away from all the other students.
  b. Because of his mysterious rash, the nurse will not innoculate Jim but is transferring him to a separate room away from all the other students.
  c. Because of his mysterious rash, the nurse will not inoculate Jim but is transfering him to a separate room away from all the other students.
  d. Because of his mysterious rash, the nurse will not inoculate Jim but is transferring him to a separate room away from all the other students.