Assalam alaikum
1 - The New Testament Gospel of
Mark, though considered by Church scholars to be the oldest of the Gospels, was not written by a disciple of Jesus. Biblical scholars concluded, based on the evidence contained in the Gospel, that Mark himself was not a disciple of Jesus. Furthermore, according to them, it is not even certain who Mark really was. The ancient Christian author, Eusebius (325 C.E.), reported that another ancient author, Papias (130 C.E.), was the first to attribute the Gospel to John Mark, a companion of Paul.
Although
Matthew, Luke and John are the names of disciples of Jesus, the authors of the Gospels bearing their names were not those famous disciples, but other individuals who used the disciples’ names to give their accounts credibility. In fact, all the Gospels originally circulated anonymously. Authoritative names were later assigned to them by unknown figures in the early church.
(The New Encyclopaedia Britannica, vol. 14)
http://www.missionislam.com/knowledge/truejesus.htm2- The Infancy Gospel of Thomas's Account of Prophet Jesus (alahyi salaam)'s birth:
"... Jesus spake when he was in the cradle, and said to his mother: "Mary, I am Jesus the Son of God, the Word, which thou didst bring forth according to the declaration of the angel Gabriel, and My Father hath sent me for the salvation of the world."
Just because the Infancy Gospel was authored in the second century that does not exclude the possibility that it might have included stories circulating during the first century.
However, there is much doubt surrounding this book and where it has obtained its information from:
No final judgment about the original form and content is possible.
Even if the earliest version of this gospel remains uncertain (Helmut Koester, Ancient Christian Gospels, page 311-312)
The individual stories themselves, however, may derive from the end of the first century-though there is no possibility of proving so early an origin for any of them. (F. Lapham, An Introduction to the New Testament Apocrypha, page 129)
Allah knows best
