Which of the following metals is obtained by leaching its ore with dilute cyanide solution ?

Which of the following metals is not extracted by leaching ?

Which of the following metals is not extracted by leaching ?

Which of the following metals is obtained by leaching out process using a solution of NaCN and then precipitating the metal by addition of zinc dust?

Which of the following metal is correctly matched with its ore :

Which of the following metals is leached by cyanide process a