Task: Please answer the multiple choice question.
Question: Which molecule has the highest acute oral toxicity rat LD50?
Constraint: Even if you are uncertain, you must pick either a, b, c, or d without using any additional words.
Options:
[a] CC1=CC(=O)N2CC(=O)N(C)c3ccc(Cl)cc3C2(c2ccccc2)O1
[b] Cc1ccccc1-n1c(C)nc2ccc(N)cc2c1=O
[c] Cc1cc(-n2c(C)nc3ccccc3c2=O)n(-c2ccccc2)n1
[d] CN(C)CC(=O)NN=Cc1c(-c2ccc(Cl)cc2)nc2n1CCS2
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}