Final answer:
In Christian belief, Christ is the central figure who is said to have risen from the dead, thus if no one had risen, the answer would be Christ. Option a.
Step-by-step explanation:
The question you've asked pertains to events described in Christian theology, specifically regarding the resurrection. According to Christian belief as recorded in the New Testament of the Bible, Christ, meaning messiah or savior, is said to have risen from the dead after three days.
His followers, known as disciples or apostles, and also the blessed are also often depicted as rising to heaven in Christian art and theology after their death. However, the unique event of coming back to life after death is particularly associated with Christ.
Therefore, if the dead rise not, the one who is central to Christian faith and believed to have risen would be Christ. Option a.