Task: Please answer the multiple choice question.
Question: Which molecule has the highest acute oral toxicity (LD50 in rats)?
Constraint: Even if you are not sure, you must pick either a, b, c, or d without using any additional words.
Options:
a Brc1ccc(-c2ccc(Br)c(Br)c2Br)c(Br)c1Br
b C=CC(=O)OCCSCC
c OC(O)C(Cl)(Cl)Cl
d CNC(=O)Oc1cccc2c1OC(C)(C)O2
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}