The most obvious sign of an individual suffering from carbon monoxide poisoning is:
a. Muscular impairment
b. Cyanosis of the lips and fingernails
c. Sensory loss, particularly tunnelling of vision
d. Cherry red lips and flushed cheeks
a. Muscular impairment
b. Cyanosis of the lips and fingernails
c. Sensory loss, particularly tunnelling of vision
d. Cherry red lips and flushed cheeks