(TeX-add-style-hook
 "face_selectivity"
 (lambda ()
   (TeX-add-to-alist 'LaTeX-provided-class-options
                     '(("exam" "a4paper" "12pt" "pdftex")))
   (TeX-run-style-hooks
    "latex2e"
    "../header"
    "../instructions"
    "exam"
    "exam12")
   (TeX-add-symbols
    "ptitle"))
 :latex)