In the context of wearable technology, which of the following tasks is/are accomplished by wearable devices? I. Location identification of a person II. Sleep monitoring of a person III. Assisting the hearing impaired person Select the correct answer using the codes given below:

Wearables are body-worn sensors and computing devices, and all three tasks here are routinely done by them. Statement I is true: GPS-enabled smartwatches and tracking bands, including those used for children and elderly persons, locate the wearer. Statement II is true: accelerometers and heart-rate sensors in fitness bands and smartwatches estimate sleep duration and stages. Statement III is true: hearing aids are worn devices that amplify and process sound, and smart hearing devices now connect to phones for this purpose.

Since all three are accomplished, the answer is D. The core concept is the sensor-based wearable, which combines GPS, motion, physiological and audio sensing with connectivity. For Mains, this links to GS-III on digital health and emerging technology, and to GS-II on the RPwD Act, 2016, which recognises assistive devices for persons with disabilities.

Trap: aspirants often treat location tracking and sleep monitoring as smartphone-only functions, or assume hearing aids are not 'wearable technology' because they are medical devices. Both are wrong. Each statement tests capability, not accuracy.