Some diseases are transmitted through contaminated articles. The method is called

In the sigmoid curve of growth, the alphabets indicate the sequence of events. Choose the correct option where the alphabet specifies the event.

All stages of Plasmodium are digested in stomach of female Anopheles except

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

Which of the following diseases is caused by a protozoan?