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പരിസ്ഥിതി പ്രശ്നങ്ങൾ
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ഇനിപ്പറയുന്നവയിൽ ഏതാണ് മിനമാറ്റ രോഗത്തിന് കാരണമാകുന്നത്?
A
Pb
B
Cd
C
Fe
D
Hg
Answer:
D. Hg
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