Identify correct statements for mercury as an environment pollutant.
\[ \begin{array}{l} \text{A. Carbanionicbiomethylation converts it to } \mathrm{MeHg^{+}} \\ \text{B. Thiol group of cysteine has strong affinity for mercury} \\ \text{C. Mercury containing industrial catalyst release caused Minamata disaster} \end{array} \]
The correct answer is:
(a)A and B
(b)A and C
(c)B and C
(d)A, B and C
Answer
Answer: D ✓ checked by 4AB · confidence high
Explanation
Bacteria methylate Hg²⁺ (via methylcobalamin, a carbanion transfer) to MeHg⁺; cysteine thiols bind mercury very strongly; the Minamata disaster came from methylmercury discharged by a mercury-catalysed acetaldehyde plant. All three are correct.