<prompt> What is the type of Ag-Ab reaction seen in VDRLAgglutinationFlocculationPassive agglutinationGel precipitation  <response>: Instead of sedimenting,the precipitate remains suspended as floccules which is called flocculation,which is a type of precipitation reactions,one amongst whose applications is the VDRL test for syphilis. Ref: anantnarayan and panikers 10 th edition 