<prompt> The relative risk of a disease measures the -Strength of association between suspected cause and effectBiological plausibility between suspected cause and effectTemporal relationship between suspected cause and effectSpecificity of association between suspected cause and effect  <response>: Defined as the ratio between the incidence among exposed persons and incidence among non exposed. A typical case-control study does not provide incidence rates from which relative risks can be calculated directly because there is no appropriate denominator or population at risk to calculate these risks. Ref: 25th edition, Parks Textbook of Preventive and Social Medicine, Page no. 86 