Task: Please answer the multiple choice question.
Question: Which molecule has the highest acute oral toxicity (LD50 in rats)?
Constraint: Even if you are uncertain, you must pick either a, b, c, or d without using any additional words.
Options:
[a] CCOCC(C)O
[b] CN(C)c1ccc(C=C2C(=O)N=C3c4ccccc4N=CN23)cc1
[c] CN1CN(CC(=O)O)CSC1=S
[d] O=C(OC1CCCCC1)C(Oc1ccc(Cl)cc1)Oc1ccc(Cl)cc1
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}