Which one of the following causes kala-azar

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Which one of the following causes kala-azar?

1. Ascaris
2. Trypanosoma
3. Leishmania
4. Bacteria

Answer

Leishmania a protozoa causes kala-azar or black fever signs and symptoms include, fever, weight loss, fatigue, anaemia and swelling of liver and spleen.

The correct option is C.