Which of the following is not an extrasensory power?
a. clairvoyance
b. hearing
c. precognition
d. telepathy

Option b=> hearing.

Explanation:

When information are getting to individual without the person using his or sense organs such as the eyes(vision), ears(audio/hearing), skin(feeling), tongue (tasting) and nose(perceiving smell) then we say that the individual has '' psychic powers'' or the sixth sense.

extrasensory power.

If you look at the meaning of option (a), that is clairvoyance, it is more of seeing the future which can never be seen with our normal eyes, therefore, it is an extrasensory power

Option (b), can be done with our normal ears, hence, it is not an extrasensory power.

Option (c) and (d) that is precognition(knowing what is coming without seeing with norm human eyes) and telepathy(being able to read People's mind) respectively are both extrasensory powers.