Question

Which sentence uses a colon correctly to introduce a list?

This: is what I told him to get at the store, hammer, nails, wood, glue, and paint.

This is what I told him to get at the store: hammer, nails, wood, glue, and paint.

This is what I told him to get: at the store hammer, nails, wood, glue, and paint.

This: is what I told him: to get at the store, hammer, nails, wood, glue, and paint.