Which statement is correct about rough ER and smooth ER?

Rough ER transports materials other than proteins, and smooth ER contains ribosomes.

Rough ER transports proteins, and smooth ER contains ribosomes.

Rough ER contains ribosomes, and smooth ER transports proteins.

Rough ER contains ribosomes, and smooth ER transports materials other than proteins.

The correct statement is:

Rough ER transports proteins, and smooth ER contains ribosomes.

The correct statement is: Rough ER transports proteins, and smooth ER contains ribosomes.