Task: Please answer the multiple choice question.
Question: Which molecule has the highest Caco-2 permeability?
Constraint: Even if you are uncertain, you must pick either a, b, c, or d without using any other words.
Options:
a: C[C@@](N)(Cc1ccc(O)c(O)c1)C(=O)O
b: O=C(NC1(C(=O)N[C@H](Cc2ccccc2)C(=O)NCC2CCN(C3CCOCC3)CC2)CCCC1)c1cc2ccccc2s1
c: NS(=O)(=O)c1ccc(C2=C(c3ccccc3)C(=O)OC2)cc1
d: Cc1cn([C@H]2C[C@H](N=[N+]=[N-])[C@@H](CO)O2)c(=O)[nH]c1=O
Answer: b
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}