<prompt> True about confounding factor-It is found equally between study and controlIt is itself a risk factor for the diseaseConfounding can be eliminated by selecting a small groupIt is associated with either the exposure or the  <response>: Ans. is b i.e., It is itself a risk factor for the disease Confounding factor has following characteristics i Associated with the both exposure and the disease ii Distributed unequally in study and control groups iii Itself is a risk factor for the disease. 