Danbury tremor is seen in?

Danbury tremor is seen in?
A. Mercury poisoning
B. Iron poisoning
C. Lead poisoning
D. Arsenic poisoning

Correct answer : A. Mercury poisoning

Danbury tremor is a classical and consistent manifestation of mercury poisoning.
It is a coarse intentional tremor interspersed with jerky movements.
It begins in the hand and progresses to lips, tongue, arms and legs.