Painful lockjaw is seen in case of following EXCEPT?

Ans. (a) TetanyRef: Harrison 18th ed./352* Painful lock jaw is related to inflammation of anatomical structures of jaw and surrounding structures. Tetanus is characterized by release of tetano-spasmin toxin which causes painful muscle spasm and lockjaw.* However in the question the choice A is Tetany/ Hypocalcemia where either Chvostek sign and Carpo- pedal spasm is seen.