This question checks the reservoir host pattern of kala azar specific to India.
Man: Indian visceral leishmaniasis is anthroponotic, so infected people are the reservoir that sandflies feed on and spread further, which is why the National Kala Azar Elimination Programme focuses on finding and treating human cases.
Dog: the reservoir in Mediterranean and some other zoonotic regions, but not the pattern seen in India.
Pig: not a recognised reservoir for Leishmania donovani anywhere.