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 additional words.
Options:
[a] CCOC(=O)c1c[n+](CC)c2n(c1=O)C(C)CCC2
[b] CNc1nc(C)nc(OC)n1
[c] NC1(C(=O)O)CCCC1
[d] O=[N+]([O-])c1cc2c(ccc3ccccc32)o1
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}