कारखानों से निकलने वाले प्रदूषित धुएँ से कौनसा रोग होता है ? - Which disease is caused by polluted smoke coming out of factories? - Kaarkhanon Se Nikalne Wale Pradooshit dhuein Se Kaunsa Rog Hota Hai ? General Science in hindi, Physics Malaria question answers in hindi pdf Dama questions in hindi, Know About AIDS General Science online test General Science notes in hindi quiz book typhoid