Black lung disease is common among
Coal miners
Refinery workers
Farmers
Petrochemical industry workers
Widal test is used for the diagnosis of
Which drugs quickly reduce the symptoms of allergy ?
Assertion : Escherichia coli, Shigella sp. and Salmonella sp. are all responsible for diarrhoeal diseases.
Reason : Dehydration is common to all types of diarrhoeal diseases and adequate supply of fluids and electrolytes should be ensured.
Motile elongate zygote of Plasmodium occurs in