The correct option is A Salmonella
Pollarum or white diarrhoea is caused by bacterium Salmonella pollarum. The disease spreads through contaminated food and water and is characterised by loss of appetite and difficulty in breeding. Some other poultry disease are as follows-
Ranikhet - viral disease
Fowl pox - viral disease
Fowl cholera - Pasteureila muiticide
Coryza- Haemophllus gailindrum.