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 other words.
Options:
a: O=C(C(Cl)(Cl)Cl)C(Cl)(Cl)Cl
b: CCC(CO)NCCNC(CC)CO
c: ClC1(Cl)C2(Cl)C3C4(Cl)C1(Cl)C1(Cl)C4(Cl)C(Cl)(Cl)C3(Cl)C21Cl
d: C1CNCCN1
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}