513.All structures are preseved in radical neck surgery except

a.Carotid arteries
b.Cranial nerves 7,9,10
c.Phrenic nerve
d.Accessory nerve

Ans-d.Accessory nerve 

512.All are the causes of hypokalemia except

a.Following trauma
b.starvation
c.loss of GIT secretions
d.All of the above

Ans-d.All of the above

511. When the dentist enters the operatory, the patient, who is new to the office, stands close to the wall, has his arms folded, and is looking at the floor. The dentist should initiate communication by saying which of the following?

A. Let's get going, I've got a lot to do.
B. What are you angry about?
C. Didn't my assistant get you seated?
D. You seem uncomfortable; did you have a bad dental experience?
E. Hi, I'm Doctor Wilson, what brings you here today?