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] CCC(C)(C)c1ccc(OP(=O)(NC)OC)c(Cl)c1
[b] CCN(CC)CCNC(=O)c1cc(Cl)cc(Cl)c1OCc1ccccc1
[c] CCOP(=S)(OCC)SCc1nnc(OC)s1
[d] C=CC(=O)Nc1ccc(O)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}