Snow White C2 Advanced Grammar Challenge

Which sentence uses a correctly reduced relative clause?

• The dwarfs, who were living in the cottage, welcomed Snow White.
• The dwarfs living in the cottage welcomed Snow White.
• The dwarfs were living in the cottage welcomed Snow White.
• The dwarfs, living in the cottage, which welcomed Snow White.

Explanation

To reduce a defining relative clause (who were living in the cottage), we drop who were to form living in the cottage.