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) CCOP(=S)(Oc1cnn(CC)c(=O)c1OC)OC(C)C
b) CON(C)C(=O)Nc1ccc(Cl)cc1
c) C#CCOS(=O)OC1CCCCC1Oc1ccc(C(C)(C)C)cc1
d) COP(=S)(OC)Oc1ccc(C#N)cc1C
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}