Task: Please answer the multiple choice question.
Question: Which molecule has the highest LD50 in rats (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] C=CN(CC)N=O
[b] CCCCc1ccc(C(=O)O)nc1
[c] Cn1cnc2c1c(=O)n(CCCN1CCN(c3ccc(Cl)c(Cl)c3)CC1)c(=O)n2C
[d] CCOc1ccc(C2(c3ccc(OCC)cc3)CC2(Cl)Cl)cc1
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}