Diagnosis related groups classify outpatient cases into groups that consume similar resources

During the morning drug inventory of your unit, you notice that you have a solution of 10% calcium chloride available. Based on the commonly used weight/volume percentage, you know that this solution contains:

a. 10 milligrams/100cc b. 100 grams/cc c. 10 grams/cc d. 10 grams/100cc

What is the instructional note under the code for unspecified acute lower respiratory infection?

A) Code also upper respiratory infection. B) Excludes upper respiratory infection C) Excludes tuberculosis D) Use additional code to identify source of infection.