Which of the following substituents has the highest priority according to the Cahn-Ingold-Prelog system used in assigning R and S configurations?

Question

Quizplus · Accepted Answer

The Cahn-Ingold-Prelog priority rules assign higher priority to atoms with higher atomic numbers. Among the options, −COOH (carboxylic acid group) has the highest priority because it contains an oxygen atom directly attached to the first point of difference, which has a higher atomic number than the other elements involved in the other groups.

Which of the Following Substituents Has the Highest Priority According