Task: Please answer the multiple choice question.
Question: Which molecule has the highest Caco-2 cell effective permeability?
Constraint: Even if you are uncertain, you must pick either a, b, c, or d without using any other words.
Options:
a COc1cnn(C)c(=O)c1-c1ccc(C[C@@H](CO)NC(=O)c2c(Cl)cccc2Cl)cc1
b CC(C)c1c(C(=O)Nc2ccccc2)c(-c2ccccc2)c(-c2ccc(F)cc2)n1CC[C@@H](O)C[C@@H](O)CC(=O)O
c CC1NC(=O)C(CC(=O)O)NC(=O)CNC(=O)CNC(=O)C(C)NC(=O)C(Cc2c[nH]c3ccccc23)NC1=O
d CC(=O)N[C@H](C)C(=O)NCCc1ccccc1
Answer: a
Task: Please answer the multiple choice question.
Question: Which molecule has the highest {permeability__names__noun}?
Constraint: Even if you are {#uncertain|not sure!}, you must pick either {%multiple_choice_enum%2-5%aA1} without using any {#other|additional!} words.
Options:
{SMILES%permeability%}
Answer: {%multiple_choice_result}