Task: Please answer the multiple choice question.
Question: Which molecule has the highest acute oral toxicity (LD50 in rats)?
Constraint: Even if you are not sure, you must pick either a, b, c, or d without using any additional words.
Options:
[a] CCCN(CCC)C(=O)C(CCC(=O)NCCCOC(=O)Cc1c(C)n(C(=O)c2ccc(Cl)cc2)c2ccc(OC)cc12)NC(=O)c1ccccc1
[b] CCN(CCC#N)c1ccc(N=Nc2nc3ccc(S(C)(=O)=O)cc3s2)c(C)c1
[c] C=C(C)C(=O)OC=C(C)C
[d] CCCCSCCCC
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}