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 additional words.
Options:
a.) O=c1nc2[nH]c(=O)[nH]cc-2[nH]1
b.) O=[N+]([O-])c1cc2c(ccc3ccccc32)o1
c.) Cc1ccc(O)c(C2CCCCC2)c1
d.) COP(=S)(OC)SC1CCSc2ccc(Cl)cc21
Answer: c
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}