Task: Please answer the multiple choice question.
Question: Which molecule has the highest rat LD50 (oral exposure)?
Constraint: Even if you are not sure, you must pick either a, b, c, or d without using any other words.
Options:
[a] c1nc(NC2CC2)c2ncn(C3CC3)c2n1
[b] CCNc1nc(NC(C)(C)C)nc(OC)n1
[c] CCNc1nc(NC(C)C(C)C)nc(SC)n1
[d] O=C1CCCC(=O)O1
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}