62. If glucose is labeled with 14C at C-5, which of the following compounds can be found in TCA cycle first?
(A) Malate labeled with 14C at C-2.
(B) Isocitrate labeled with 14C at C-2.
(C) α-Ketoglutarate labeled with 14C at C-5.
(D) Citrate labeled with 14C at C-3.
(E) Succinyl-CoA labeled with 14C at C-1.