<prompt> The hot-cold phenomenon is seen due to which toxin-Alpha lysinBeta lysinGamma lysinTheta lysin  <response>: Beta hemolysin: is a sphingomyelinase hemolytic for sheep Blood cells but not for human or rabbit blood cells . It exhibits hot cold phenomenon the hemolysis being at 37degC but becoming evident only after chilling Ref: Ananthanarayan panikers Textbook of Microbiology 9th edition pg no 202 