Task: Please answer the multiple choice question.
Question: Which molecule has the highest acute oral toxicity rat LD50?
Constraint: Even if you are uncertain, you must pick either a, b, c, or d without using any additional words.
Options:
a.) Nc1ncc(C=Cc2ccc([N+](=O)[O-])o2)nn1
b.) CC(Cc1ccc(C(C)(C)C)cc1)CN1CC(C)OC(C)C1
c.) C=CCCCOC(=O)C(CC)N(Cc1ccco1)C(=O)n1ccnc1
d.) CCCCCCCCCCCC=O
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}