Convulsions, anaemia, hepatomegaly etc. are the symptoms of ________.

Malaria is caused by the Plasmodium parasite, which infects and destroys red blood cells, leading to anaemia. The infection also causes the liver and spleen to enlarge, resulting in hepatomegaly and splenomegaly. In severe cases, particularly with Plasmodium falciparum (cerebral malaria), it can affect the brain and cause neurological symptoms such as convulsions.

Pneumonia primarily affects the lungs, causing cough and difficulty breathing. Typhoid causes sustained high fever, weakness, and intestinal issues. The common cold affects the upper respiratory tract.

Answer: malaria