Smoking increases ______ content in blood and reduces the concentration of haembound oxygen. Fill the blank suitably
Carbon dioxide
Carbaminohaemoglobin
Carbon monoxide
Carboxylic acid
Which one of the following causes plague
$A$ : Antibiotics like penicillin can be used to treat common cold.
$R$ : Penicillin causes lysis of viral cells.
$X-$rays are used in
Hodgkins disease is
Antivenom against snake poison contains