Answer:
the study of the structure, reaction, and composition of different kinds of substances
Explanation:

A coma like state which may alternate with periods of agitation is very likely to be diagnosed as comatose schizophrenia.
Schizophrenia can be a hard disease to diagnose and for that reason, the comatose subtype can be ever harder to diagnose sometimes.
B. Long term alcohol use.
HOWEVER, there are other causes of cirrhosis besides alcohol, including forms of hepatitis virus and some gallbladder disease
I think A dont count me on that