Look at the image shown here. (b) is the parent compound. (a) and (c) differ only around 1 carbon atom. Therefore, they are [Select] a 1 CHO HO-2C-H 3 HO-C-H H-C-OH 5 H-C-OH CHOH b 1 CHO 1 2 H-C-OH 3 HO-C-H H-C-OH H-C-OH 6 CHOH C CHO 1 H-C-OH 2 HO-C-H HO-C-H 5 H-C-OH CHOH