The correct relative pronoun to complete this sentence.
Alchemists, _____ wanted to transform base metals into gold, were also among the first people to conduct laboratory experiments is option D. WHO
It is a non-defining realtive clause. Non-defining realtive clauses add extra information to a sentence by defining the noun. That can be used as a replacement of which or who in defining relative clauses. But it is not correct to use THAT to replace shich /who in non defining realtive caluses
