A middle aged man comes to OPD with paraesthesia of hands and feet, hyperkeratosis of palms, rain drop pigmentation and transverse lines on nails. Most likely the person is having -
The man in question has :

(i) Paresthesia of hands and feet
(ii) Raindrop pigmentation
(iii) Hyperkeratosis of palm    
(iv) Transverse lines on the nail (mees' line)

All are seen in arsenic poisoning.
Arsenic poisoning
Lead poisoning
Mercury poisoning
Cadmium poisoning