"Compounding pharmacies" are pharmacies that manufacture drugs for a specific persons needs, so they will most like be "<span>C. smaller than the average retail pharmacy."</span>
In the ICD-10-CM index to diseases and injuries (alphabetic index), the code next to the main term called a default code. It would represent the condition that is commonly related with the main term. In a case where the condition is not documented in a record without any information, then this code should be assigned.
A poisonous snake of North America is the Rattlesnake... I'm not sure if it's one of only 2, but it is one.