In the case of HOCH2CH2CH2COOH, from where is numbering started?

Explanation

Option B: This is because it is first in the priority order.Option A) OH group is given number 1 position is incorrect because the -OH group is not the highest priority functional group in this molecule. Therefore, it should not be used to determine the numbering.Option C) COOH is given the number 3 position and Option D) COOH is given the number 4 position are both incorrect because they do not follow the IUPAC nomenclature rules. According to these rules, the carboxylic acid group should be given the number 1 position, and the numbering should proceed in such a way that all other functional groups receive the lowest possible number.