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থিম নির্বাচন

আপনার পছন্দের থিম বেছে নিন।

Which chemical substance can cause cancer?

A. Liquor ammonia
B. Caustic potash
C. Formalin
D. Chloroform
সঠিক উত্তরঃ C. Formalin
Explanation: Remember: Chloroform → severe harm to central nervous system; death is inevitable if too much is inhaled into the lung. Liquor ammonia → asthma, inflammation in throat and respiratory tract; 
Caustic potash → throat, respiratory tract and stomach inflammation.
[Hazari Sir: Edition-2022, Page-47]