CaC2 on treatment with water gives A. methane B. ethane C. ethylene D. acetylene

The other options are incorrect because they are not produced by the carbide process. Methane (CH4), ethane (C2H6), and ethylene (C2H4) are all hydrocarbons that are produced by other processes.

Methane is produced by the decomposition of organic matter, such as coal or natural gas. Ethane and ethylene are produced by the cracking of hydrocarbons, such as petroleum.