Task: Please answer the multiple choice question.
Question: Which molecule has the highest acute oral toxicity rat LD50?
Constraint: Even if you are uncertain, you must pick either a, b, c, or d without using any other words.
Options:
a.) COP(=S)(OC)Oc1ccc(Cl)c([N+](=O)[O-])c1
b.) COc1c2occc2c(OC)c2c(=O)cc(C)oc12
c.) CNC(=O)Oc1cccc2c1OC(C)(C)C2=O
d.) CCOC(=O)CCCCCCCCC(C)c1ccc(I)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}