Faded tattoo mark can be visualized by -

Ans. is 'a' i.e., Ultraviolet rays Latent tattoo marks (faded marks) can be visualized by:-Use of ultraviolet lightInfrared photograpy Rubbing the pa and examining under magnifying glassIf tattoo marks are obscured by decomposition they can be visualized by treating with 3% H202.Tattoo marks can be developed by treating the skin by 0.5% caustic potash.Histopathology of local lymph nodes for pigment.