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(Oc2cc(SCC(=O)NN)ncn2)cc1
b.) O=C(Cl)c1cccc([N+](=O)[O-])c1
c.) CCN(CCC(=O)OC)c1ccccc1
d.) CCOc1ccccc1C(=O)NN=C(C)C(=O)O
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}