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) CCCCCc1ccc(C)cc1O
(b) Cc1ccc(C)c(O)c1
(c) CC(C)=NNC(=O)CSc1cc(Oc2ccccc2)ncn1
(d) O=C(O)Cn1c(=O)n(Cc2ccc(Br)cc2F)c(=O)c2ccc(F)cc21
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}