The correct options are
A The first modern cement factory in Karnataka was set up at Bhadravathi in 1939.
C Cement factories were set up at Ammasandra of Tumakuru district, Shahabad of Kalaburagi district.
D Limestone, gypsum, and bauxite are the necessary materials for making cement.
The first modern cement factory in Karnataka was set up at Bhadravathi in 1939. Subsequently, factories were set up at other regions like - Bagalkot, Ammasandra of Tumakuru district, Shahabad of Kalaburagi district.
Limestone, gypsum, and bauxite are the necessary materials for making cement, and they are available in Karnataka. Coal is imported from the neighbouring states.
Around 8% of the total cement production in the country is that of Karnataka, which makes up to around 121 lakh tonnes of cement annually.