The correct options are
A Wheat straw
B Chicken manure
C Inorganic fertilizer
Mushroom culture is a highly profitable business and is done indoors. Mushrooms can be grown on substrate or compost made out of different types of agricultural wastes. The compost is prepared by mixing following items.
1. Wheat or paddy straw/hay
2. Chicken manure
3. Some organic or inorganic fertilizer like gypsum
By mixing these ingredients in certain proportions, compost is made ready.