Match the pollutant (Column I) with the effect (Column II). Column I: P = cadmium, Q = nitrate in drinking water, R = fluoride, S = methylmercury. Column II: 1 = Minamata disease, 2 = blue baby syndrome, 3 = itai-itai disease, 4 = mottled teeth.

AP-3, Q-2, R-4, S-1
BP-2, Q-3, R-1, S-4
CP-1, Q-2, R-4, S-3
DP-3, Q-4, R-2, S-1

Answer: A

Cadmium causes itai-itai disease, nitrate causes blue baby syndrome, fluoride causes mottled teeth (fluorosis), and methylmercury causes Minamata disease.

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