<prompt> Which one of the following is a coho studyNoh Karelia projectStandard three community studyMRFIT studyFramingham hea study  <response>: A coho study is a paicular form of a longitudinal study that samples a coho a group of people who share a defining characteristic, typically those who experienced a common event in a selected period, such as bih or graduation, performing a cross-section at intervals through time. Ref: 25th edition, Parks Textbook of Preventive and Social Medicine, Page no. 83 