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 other words.
Options:
[a] CCOP(=S)(CC)Sc1ccccc1C
[b] CC(=O)c1cccc2ccccc12
[c] COP(=O)(OC)Oc1ccc([N+](=O)[O-])c(Cl)c1
[d] CCC(C)Nc1ccc(NC(C)CC)cc1
Answer: b
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}