Hydrogen atom(s) from which position(s) is (are) most likely to be abstracted when the following substance is treated with NaH ?
(A) 1
(B) 1, 5, 6
(C) 1, 2
(D) 3, 4, 7, 8, 9, 10
(E) Hydrogens from all of the positions are equally likely to be abstracted by NaH.
