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 Cc1ccc(Cl)c(Nc2ccccc2C(=O)O)c1Cl
b O=C(O)CC(O)c1ccc(-c2ccc(Cl)cc2)o1
c OC1C2C3OC3C1C1C2C2(Cl)C(Cl)=C(Cl)C1(Cl)C2(Cl)Cl
d CCOP(=S)(OCC)SCc1nnc(C)o1
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}