In the context of wearable technology, which of the following tasks is/are accomplished by wearable devices?1.Location identification of a person2.Sleep monitoring of a person

1. A

   1 only

   (a) 1 only. Wearables also monitor sleep and can assist hearing. Dropping 2 and 3 is not the key.

2. B

   2 and 3 only

   (b) 2 and 3 only. Location identification (GPS watches, fitness bands) is also a core wearable task. Dropping 1 is not the key.

3. C

   3 only

   (c) 3 only. Hearing assistance is only one of the three listed tasks. Not the key.

4. D

   1, 2 and 3

   (d) 1, 2 and 3. Wearable devices can locate a person, log sleep, and assist the hearing-impaired (connected hearing aids, cochlear processors, haptic alerts). All three are accomplished. Official key.

Summary. Official key is (d). Wearables are body-worn computers: GPS and beacons for location, accelerometers and heart-rate sensors for sleep, and hearing-aid class devices for the hearing-impaired. None of the three tasks is outside the category. Honour (d).