<prompt> Which of the following is the best method of validity?Content validityCriterion validityConsensual validityDiscriminant validity  <response>: 1. Content validity: Measurement of all variable components.2. Consensual validity: If no. of experts agree to a parameter.3. Criterion validity: If compared with a reference or gold standard.It is the best measure of validity.Usually expressed as sensitivity specificity. 4. Discriminant validity: If not showing a strong correlation between 2 variables. 