In each of the following questions, four words have been given out of which three are alike in some manner, while the fourth one is different. Choose the word which is different from the rest.
Brass, Bronze and Steel is a metallic alloy made up of two or more chemical element. But Silver a chemical element with symbol Ag and atomic number 47.
A sentence has been given in Active/Passive Voice. Out of the four given alternatives, select the one which best expresses the same sentence in Passive/Active Voice.