Consider the following statements
Effective temperature is NOT a true comfort index because
1. Discomfort may be experienced at extremely high or low humidities
2. The radiation effect of surrounding surface has not been taken into account
3. It presumes the absence of drafts
Of these statements
(a) 1, 2 and 3 are correct
(b) 1 and 2 are correct
(c) 1 and 3 are correct
(d) 2 and 3 are correct