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Question
Coke is produced
Options:
A .  When coal is strongly heated continuously for 42 to 48 hours in the absence of air in a closed vessel
B .  When coal is first dried and then crushed to a fine powder by pulverizing machine
C .  By heating wood with a limited supply of air to a temperature not less than 280°C
D .  From the finely ground coal by moulding under pressure with or without a binding material
Answer: Option A

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