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] CCOC(=O)c1c[n+](CC)c2n(c1=O)C(C)CCC2
[b] Cc1ccc(-c2nc3n(c2C=NNC(=O)CN(C)C)CCS3)cc1
[c] CC(C)Nc1nc(NC(C)C)nc(N(C)C#N)n1
[d] Nc1nc(N)nc(N)n1
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}