D&C 74

 Concerning the words of Paul, the Lord revealed - 

"Wherefore, for this cause the apostle wrote unto the church, giving unto them a commandment, not of the Lord, but of himself, that a believer should not be united to an unbeliever; except the law of Moses should be done away among them..."  (Doctrine and Covenants 74:5)

In other words - 

"...there is no other way nor means whereby man can be saved, only through the atoning blood of Jesus Christ..."  (Helaman 5:9)

...for those that are accountable.