Task: Please answer the multiple choice question.
Question: Which molecule has the highest acute oral toxicity (LD50 in rats)?
Constraint: Even if you are not sure, you must pick either a, b, c, or d without using any other words.
Options:
a.) O=S(=O)(O)c1c(O)ccc2ccccc12
b.) CCOP(=S)(OCC)Oc1ccccc1[N+](=O)[O-]
c.) CCOP(=S)(OCC)Oc1cc(C)c(SC)c(C)c1
d.) Nc1ccc(S(N)(=O)=O)cc1
Answer: d
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}