Task: Please answer the multiple choice question.
Question: Which molecule has the highest acute oral toxicity rat LD50?
Constraint: Even if you are uncertain, you must pick either a, b, c, d, or e without using any other words.
Options:
a.) O=C1OC(=O)C2CC(Cl)=CCC12
b.) COc1ccccc1NC(=O)CC(=O)c1ccccc1
c.) [O-][n+]1c2ccccc2[n+]([O-])c2c3ccccc3ccc21
d.) CNc1nc(C)nc(OC)n1
e.) NC1(C(=O)O)CCCC1
Answer: b
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}