$A$ – Smoking is associated with increased incidence of cancer of lung

$R$ – It increase $CO$ content in blood and reduce the concentration of haembound oxygen

Out of the following diseases which are caused due to bacterial infection?

$a.$ Typhoid
$b.$ Elephantiasis
$c.$ Cholera
$d.$ Tuberculosis

Which virus, for the first time, was synthesised in the form of non-living crystals

In which of the following disorder, the alveoli get filled with fluid leading to severe problems in respiration?

Read the following statements
$a.$ Heroin, commonly called smack, is obtained by acetylation of morphine.
$b.$ Cocaine is obtained from the latex of Papaver somniferum.
$c.$ Dopamine is excitatory neurotransmitter.
$d.$ Morphine is an effective sedative and pain killer.
Mark the option which includes both correct statement