Kozhikode: K. Ritwik of Silver Hills Higher Secondary School, Joel Oommen of Auxilium Navajyoti H.S.S. and M. Aravind of Bharatiya Vidya Bhavan H.S.S. secured the first, second and third prizes in the quiz conducted by the Oisca International Kozhikode chapter for schoolchildren in connection with World Environment Day on Friday. — Staff Reporter

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