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=c1n(CCCN2CCN(c3cccc(Cl)c3)CC2)nc2ccccn12
b.) ClC(Cl)(Cl)Cl
c.) COc1cc2ccc(=O)oc2cc1O
d.) Ic1ccc(Nc2nnc(CCN3c4ccccc4Sc4ccccc43)s2)cc1
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}