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] COP(=S)(OC)SC1CCSc2ccccc21
[b] Cc1cc(=NC(=O)c2ccccc2O)n(C)n1C
[c] CSc1nc(NC(C)C)nc(NC(C)C)n1
[d] O=C(OC1CCCCC1)c1ccccc1C(=O)OC1CCCCC1
Answer: d
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}