Consider the following statements
1. Effective temperature is an empirical index of warmth that takes into account the effect of
temperature humidity and air movement
2. Effective temperature is not a true comfort index as it does not consider the radiation effect of
surrounding surfaces
3. It is the best comfort index for still air condition with 30% to 70% relative humidity
Which of these statements is/are correct?
(a) 1, 2 and 3 (b) 1 and 2 only (c) 2 and 3 only (d) 3 only