You Are a Medical Student on Rounds with Your Instructor,and

Multiple Choice

You are a medical student on rounds with your instructor,and you are told to help measure blood pressure,so you hand the instructor a(n)  

A) barometer and stethoscope.
B) stethoscope and sphygmomanometer.
C) barometer and sphygmomanometer.
D) hygrometer and sphygmomanometer.
E) hygrometer and barometer.