MCAT question number 38

I cannot reveal my source, but I once again am privy to esoteric wisdom. The following is a question I have obtained from the Medical College Admission Exam (MCAT):

What is the best definition of ACID?

• a.  Crystal Meth
• b.  Any of a class of substances whose aqueous solutions are characterized by a sour taste, the ability to turn blue litmus red, and the ability to react with bases and certain metals to form salts.
• c.  An acronym:  Albuterol Cures Inclement Disorders