Which of the following is the most commonly used 'fixative' in diagnostic pathology?: (A) Formaldehyde, (B) Ethyl alcohol, (C) Mercuric chloride, (D) Picric acid
Answer is A. Formaldehyde is the most commonly used fixative in diagnostic pathology. Ref: Surgical Pathology Dissection: An Illustrated Guide By William H. Westra, Page 14.