This is the THIRD time I've done this question and because I did not read the question carefully. I felt for the trap once again. (slap to the face)
Ok. I don't think $244 should trouble you at all.
like I mentioned, higher molecular wins. Everything is as it is how the answer key explains.
#230... Same thing happens. Yes the compound name should be (2R, 3S)-2-bromo-3-chlorobutanoic acid.... Based on our understanding of what gets the higher priority. However the quesitons asks for the ENANTIOMER of this. That is why it is choice C. Not that COOH had the priority over higher molecular weight Chlroine. Read the question carefully. I hope I don't make this mistake on my real DAT.
good luck on your DAT, I noticed you have it real soon.
P.S. Get off this forum until your exam lol. Someone had already mentioned to you. I've heard it is mentally stressful to be here right before exam time.