Duplex process, used to manufacture steel, is a combination of which of the following two processes?

Basic Bessemer process and acid open-hearth process

Basic Bessemer process and basic open-hearth process

Acid Bessemer process and acid open-hearth process

Acid Bessemer process and basic open-hearth process

Basic Bessemer process and acid open-hearth process

Duplex process, used to manufacture steel, is a combination of which

1.	Duplex process, used to manufacture steel, is a combination of which of the following two processes?
A.	Basic Bessemer process and basic open-hearth process
B.	Acid Bessemer process and acid open-hearth process
C.	Acid Bessemer process and basic open-hearth process
D.	Basic Bessemer process and acid open-hearth process
Answer» D. Basic Bessemer process and acid open-hearth process