This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Communicable Diseases, Subject name: Social & Preventive Medicine
Tuberculin testing done at - 
Select and explain. 
A. Dorsum of left arm, B. Dorsum of right arm, C. Ventral aspect of left forearm, D. Ventral aspect right forearm.
C: Ventral aspect of left forearm
Answer: C: Ventral aspect of left forearm 
Explanation: 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 mm|||PositiveNegativeEquivocal | Repeat tuberculin test (two step testing)