<prompt> Tuberculin testing done at -Dorsum of left armDorsum of right armVentral aspect of left forearmVentral aspect right forearm.  <response>: Ans. is c i.e., Ventral aspect of left forearm o In tuberculin test, injection is given intradermally on flexor ventral surface of left forearm, mid-wav between elbow wrist.Intradermal injection of PPDon flexor aspect of forearm Examined at 48-72 hours Induration 10 mmInduration 5 mmInduration 6-9 mmPositiveNegativeEquivocal Repeat tuberculin test two step testing 