This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Poisoning, Subject name: Forensic Medicine
In methyl alcohol poisoning there is CNS depression, cardiac depression and optic nerve atrophy. These effects are produced due to - 
Select and explain. 
A. Formaldehyde and formic acid, B. Acetaldehyde, C. Pyridine, D. Acetic acid
A: Formaldehyde and formic acid
Answer: A: Formaldehyde and formic acid 
Explanation: Methanol itself is not toxic but two metabolites formed -- formaldehyde and formic acid are highly toxic. These compounds are responsible for causing profound metabolic acidosis and visual defect and blindness REF;THE SYNOPSIS OF FORENSIC MEDICINE:KS NARAYANA REDDY;28th EDITION;PAGE NO 332