I have written many essays on this topic…feel free to surf them here: https://ahmadiyyafactcheckblog.wordpress.com/?s=ghost+writers
Nonetheless, in the quote that I will present, it is obvious that MGA and his sons and most Ahmadis learned the Quran from Noorudin, not MGA.
Seeratul Mahdi vol 1 page 210 narration
“””(202) Stated to me by Molvi Sher Ali that his uncle Late Molvi Sher Muhammad told me that in the beginning hazrat maseeh e moud ( MGAQ) Used to go to attend the Dars e Quraan ( Quraanic class) of Molvi Noor Din. Once Molvi Noor din told the narration of appearance of angels in the battle of Badr . Then he tried to present a justification for this but hazrat sb agreed to it and said angels can be seen by persons other than prophets.”””
Noorudin was the chief ghost-writer of MGA. In fact, MGA sent his sons and most of all Ahmadis to Noorudin to learn the Quran, in fact, Maulvi Muhammad Ali would visit Noorudin in 1912-1914 almost daily to read out his commentary on the Quran…Noorudin would then tell Muhammad Ali what was good and etc..