“Then Jesus said to his disciples, ‘I tell you the truth, it is hard for a rich man to enter the kingdom of heaven. Again I tell you, it is easier for a camel to go through the eye of a needle than for a rich man to enter the kingdom of God.’ When the disciples heard this, they were greatly astonished and asked, ‘Who then can be saved?’ Jesus looked at them and said, ‘With man this is impossible, but with God all things are possible.’ (From the NIV Bible, Matthew 19:23-26)”
also
“To those who reject Our signs and treat them with arrogance, no opening will there be of the gates of heaven, nor will they enter the garden, until the camel can pass through the eye of the needle: Such is Our reward for those in sin. (The Quran, 7:40)”
This is the answer for this big question:
What about those who have never heard of him?