Hvilke av disse setningene har riktig bruk av subjunksjonene 'who', 'whom', 'which' og 'that'?

1. • Aunt Heather’s feather, whom is extremely long, is her best tickling tool.
   • Aunt Heather’s feather, who is extremely long, is her best tickling tool.
   • Aunt Heather’s feather, that is extremely long, is her best tickling tool.
   • Aunt Heather’s feather, which is extremely long, is her best tickling tool.

2. • The lady with whom I spent my holiday is now divorced.
   • The lady with who I spent my holiday is now divorced.
   • Ask the lady which I spent my holiday with.

3. • The mountain whom I climbed in Troms is named Blåmann.
   • The mountain which I climbed in Troms is named Blåmann.
   • The mountain who I climbed in Troms is named Blåmann.