Cleaning of base metal alloy is done by________?

DiGeorge’s syndrome is due to________?

The inlay wax most commonly used for direct technique________?

Cricothyroid is supplied by________?

When horse serum is injected intravenoulsy in to a rabbit and again in to the skin two or three weeks later, what is the necrotizing reaction that occurs as the site of the second injection________?

The second stage of deglutition is characterized by________?