Step 1: Minamata Disease Overview.
Minamata disease is a neurological disorder resulting from severe mercury (Hg) poisoning. It was initially detected in Minamata Bay, Japan, when industrial mercury waste contaminated the bay's seafood, causing extensive mercury poisoning in the local inhabitants.
Step 2: Conclusion.
Minamata disease stems from mercury (Hg) poisoning, aligning with option (4).