$A$ - Smoking is associated with increased incidence of cancer of lung
$R$ - It increase $CO$ content in blood and reduce the concentration of haembound oxygen
$A$ and $R$ both true
$A$ and $R$ both false
$A$ true, $R$ false
$A$ false, $R$ true
Which one of the following is a stimulant
If a person shows production of interferons in his body, the chances are that he has got an infection of
Penicillin was used in
Acid in stomach, saliva in the mouth, tears from eyes, all prevent microbial growth belong to which of the following barrier?
After infection of germs immunity acquired is