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, or d without using any other words.
Options:
a: ClC1=C(Cl)C2(Cl)C(CBr)CC1(Cl)C2(Cl)Cl
b: COc1ccccc1N1CCN(CCCc2ccc3c(c2)CCC(=O)N3)CC1
c: CC(C)Cc1ccc(C(C)C(=O)OCc2ccccn2)cc1
d: Clc1ccc(C(c2ccc(Cl)cc2)C(Cl)(Cl)Cl)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}