Task: Please answer the multiple choice question.
Question: Which molecule has the highest Caco-2 cell permeability?
Constraint: Even if you are not sure, you must pick either a, b, c, or d without using any other words.
Options:
a. COc1ccc2c(c1)[C@@]13CCCC[C@@H]1[C@@H](C2)N(C)CC3
b. CN1CCN(c2c(F)cc3c(=O)c(C(=O)O)cn(CCF)c3c2F)CC1
c. CNC1(c2ccccc2Cl)CCCCC1=O
d. CCCOC(=O)c1ccc(O)cc1
Answer: d
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}