<prompt> Confounding Factor is:Itself a risk factor for the disease.Associated with both exposure and disease.Is distributed unequally in study and control group.All of the above.  <response>: Confounding factor:One which is associated with BOTH exposure and disease and is distributed UNEQUALLY in study and control group.It is itself a RISK FACTOR for the disease. e.g. study of coffee drinking and lung cancer if coffee drinker is also a cigarette smoker then this cigarette smoking is a confounding factor. Confounding factor can be neutralized by MATCHING 