Wearable devices such as smart watches can track GPS location of a person and monitor his heart rate and sleeping pattern so 1 and 2 are right. There is only one option D where they're together. - But just to crosscheck validity of third statement: 2018-Feb theHindu: ReSound company's newest product, a hearing aid, LiNX 3D was named an Honoree in both the Accessible Tech and Wearable Tech categories at Consumer Electronics Show (CES), in Las Vegas. So #3 is right = Answer D: 1, 2 and 3.
