Q.

Coke is produced

• AWhen coal is strongly heated continuously for 42 to 48 hours in the absence of air in a closed vessel
• BFrom the finely ground coal by moulding under pressure with or without a binding material
• CWhen coal is first dried and then crushed to a fine powder by pulverizing machine 
• DBy heating wood with a limited supply of air to a temperature not less than 280°C