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 COCc1ccc(COC(=O)C2C(C=C(C)C)C2(C)C)cc1
b Cc1cccc(NC(=O)c2ccccc2C(=O)O)c1
c CN(C)CC(=O)NN=Cc1c(-c2ccc(Cl)cc2)nc2n1CCS2
d Cc1cnc(C)cn1
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}