<prompt> A 2 year old child has a Mantoux test reading of 12 mm x 12 mm after 48 hours. In this case ?Anti-TB drugs should be staed even if x -ray chest and haemogram are normalTreatment should be staed only if x-ray chest and haemogram are suggestiveOne should wait till ove sign of TB appearNo treatment is required  <response>: Ans. is a i.e., Anti-TB drugs should be staed even if x-ray chest and haemogram are normal 