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, or d without using any other words.
Options:
a CCn1cc(C(=O)O)c(=O)c2ccc(C)nc21
b CC(=O)CC(c1ccc(Cl)cc1)c1c(O)c2ccccc2oc1=O
c CC(C)(C)N=NC(C)(C)O
d CCOc1ccc2c(c1)C(C)=CC(C)(C)N2
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}