<prompt> Chvostek sign is?Twitching of circumoral muscles on tapping of facial nerveInvoluntary blink on tapping on facial nerveInability to open eye on tapping of facial nerveInability to close eye on tapping of facial nerve  <response>: 1. Chvostek sign - seen in hypocalcemia - Twitching of Circumoral Muscle on tapping of Facial Nerve 2. Inability to open eye on tapping of facial nerve - L.P.S 3rd nerve 