Which drug can be used to reduce the risk of miscarriage?

Which of the following pairs is not correctly matched?

Read the following sentences and choose the correct sentences:
$1.$ Dysentery,plague,and diphtheria are caused by bacteria.
$2.$ $Salmonella$ $typhi$ directly affects the respiratory system.
$3.$ Amoebiasis and Ascariasis are caused by contaminated water.
$4.$ Internal bleeding,anemia,and muscular pain are symptoms of elephantiasis.

What are the various public health measures,which you would suggest as a safeguard against infectious diseases?

In which of the following characteristics of the body does the allergic reaction play an important role?

The enlargement of the spleen during malaria is caused by: