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 additional words.
Options:
a: COP(C)(=S)Oc1ccc(Cl)cc1Cl
b: Cc1ccc(N)c(C)c1
c: O=C=Nc1ccc(Cl)c(Cl)c1
d: CCOP(=S)(OCC)OC(=CCl)c1cc(Cl)ccc1Cl
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}