The Little Mermaid C1 Mastery

Which sentence demonstrates a correct non-defining relative clause with a preposition?

• Ariel’s grotto, in which she keeps her treasures, fascinates Flounder.
• Ariel’s grotto, which in she keeps her treasures, fascinates Flounder.
• Ariel’s grotto in which she keeps her treasures, fascinates Flounder.
• Ariel’s grotto, that she keeps her treasures in it, fascinates Flounder.

Explanation

For a non-defining clause with a preposition, place the preposition before which: in which she keeps her treasures.