Q. Pick out the wrong statement.

• (A) Wash oil is used for scrubbing benzol from coke oven gas
• (B) A high swelling index number of coking coal indicates poor caking properties of coal
• (C) Ammonia is recovered in the form of ammonium sulphate in direct process of by-product recovery
• (D) Indian coals on an average contain 25-30% ash as against 10-12% ash in imported coking coal