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.) O=c1[nH]c(=O)n(CC2CC2)c2nc[nH]c12
b.) Cc1ccccc1C(C)c1ccccc1
c.) CN(C)C(=O)N(C(=O)c1ccccc1)c1ccc(Cl)c(Cl)c1
d.) c1ccc(-n2cnnc2)cc1
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}