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, d, or e without using any other words.
Options:
[a] CN1Cc2ccccc2C(=O)c2cc(CC(=O)O)ccc21
[b] CNc1nc(C)nc(OC)n1
[c] CN(C)c1nc(N(C)C)nc(N(C)C)n1
[d] S=C1NCCNC(=S)S1
[e] C=CCOc1nc(OCC=C)nc(OCC=C)n1
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}