<prompt> Direction of case control studyDirection of study is reverse but time is forwardDirection of study is forward and time is also forwardDirection of study is forward and time is reverseDirection of study is reverse and time is also reverse  <response>: Case-control study has 3 distinct features: Both exposure and outcome have occurred before the sta of the study The study proceeds backward from effect to cause It uses a control or comparison group to suppo or refute an inference Ref: 25th edition, Parks Textbook of Preventive and Social Medicine, Page no. 79 