What are the advantages of alloy?

Give one word for the following statement:

• The substance prepared by adding other metals to a base metal in appropriate proportions to obtain certain desirable properties.

Given below are two statements.

Statement I : Pig iron is obtained by heating cast iron with scrap iron.

Statement II : Pig iron has a relatively lower carbon content than that of cast iron.

In the light of the above statements, choose the correct answer from the options given below.

Name an alloy of lead and tin.

Give the composition of the following alloy: 

Brass