In which of the following pair of metals, both are commerically extracted from their respective ores by self-reduction method?

In which of the following pair of metals, both are commercially extracted from their respective ores by carbon reduction method ?

In which of the following pair of metals, both are commercially extracted from their respective ores by carbon reduction method ?

In which of the following pair both minerals are oxide and metal is commercially extracted by carbon reduction method.

Which of the following metals are extracted from its ore by using self-reduction method ?

Which of the following metal (s) is /are commercially extracted by self reduction method from their correspoindign ore ?

Which of the following metal (s) is /are commercially extracted by self reduction method from their correspoindign ore ?