Most common cause of gangrene of foot of 30 years old farmer who is a chronic smoker :

Surgery

Most common cause of gangrene of foot of 30 years old farmer who is a chronic smoker :

A tender swelling in submandibular triangle is mostly likely diagnosed as

In transfacial proportions, the face Is divided into how many segments:

Specific for Ankylosing spondylitis is true?