Highly toxic gas which causes headache, visual difficulty, paralysis and even death is
A
CO<sub>2</sub>
B
O<sub>3</sub>
C
CO
D
All of these
Correct Answer: CO
Carbon monoxide intoxication can be caused by single or repetitively generated high short-term peaks, and carbon monoxide poisoning is the leading cause of death from poisoning (accidental and intentional).