Which of the following is true in a sensory assessment of the arm?

Which of the following is true in a sensory assessment of the arm?
a) It is acceptable to test pain with a venepuncture needle
b) Proprioception is appreciated via the same tracts as light touch
c) It is best to test vibration sense with a 256 Hz tuning fork
d) Impulses for pain travel principally up the dorsal columns