Question

What is the relative pronoun in the following sentence?: The boy who made the first drawing is now making a second one.

Answer 1

The relative pronoun in the above sentence is who.

Explanation:

In the English Language, there are very few relative pronouns, which I will list below. (Which is also a relative pronoun, by the way!)
Who, which, whose, whoever, whomever, whom and that. When, where, and what can also act as relative pronouns, but only in very rare cases.

Generally, the rule of using relative pronouns is as quoted below.
"Relative clauses are typically introduced by relative pronouns, and that the relative pronoun can function as a possessive pronoun, an object, or a subject."
-http://www.gingersoftware.com/content/grammar-rules/relative-pronouns/