With reference to wearable technology, which of the following functions can/can be performed by a wearable device – 1. Determination of the location of a person 2. Sleep monitoring of a personality 3. Aid to a person with hearing impairment Select the correct answer using the code given below :

• A. केवल 1
• B. केवल 2 और 3
• C. केवल 3
• D. 1, 2 और 3