Task: Please answer the multiple choice question.
Question: Which molecule has the highest acute oral toxicity rat LD50?
Constraint: Even if you are not sure, you must pick either a, b, c, d, or e without using any other words.
Options:
a O=C(O)CCC(=O)c1ccc(C2CCCCC2)c(Cl)c1
b CCc1cc2c(cc1C=O)C(C)(C)CCC2(C)C
c CNc1nc(NC(C)C)nc(OC)n1
d Cc1nccnc1C
e CN1CCN(C2=Nc3ccccc3Oc3ccc(Cl)cc32)CC1
Answer: a
Task: Please answer the multiple choice question.
Question: Which molecule has the highest {acute_toxicity__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%acute_toxicity%}
Answer: {%multiple_choice_result}