Task: Please answer the multiple choice question.
Question: Which molecule has the highest rat LD50 (oral exposure)?
Constraint: Even if you are uncertain, you must pick either a, b, c, d, or e without using any additional words.
Options:
[a] CO[N+](=O)[O-]
[b] Clc1nc(Cl)nc(Nc2ccccc2Cl)n1
[c] CC(C)OC(=O)C=CC(=O)OC(C)C
[d] O=S1(=O)CC(Cl)C(Cl)C1
[e] CN(C)CCN(C)n1cc(-c2ccccc2)c2ccccc21
Answer: a
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}