Task: Please answer the multiple choice question.
Question: Which molecule has the highest LD50 in rats (oral exposure)?
Constraint: Even if you are not sure, you must pick either a, b, c, or d without using any other words.
Options:
[a] CC1C2Cc3ccc(O)cc3C1(C)CCN2CCc1ccccc1
[b] O=C1c2ccccc2C(=O)c2c(Nc3ccc(Oc4ccc(S(=O)(=O)O)cc4)cc3)ccc(Nc3ccc(Oc4ccc(S(=O)(=O)O)cc4)cc3)c21
[c] CCOP(=S)(OCC)SC(c1ccccc1)c1ccc(Cl)cc1
[d] CN(C)C(=O)C(CC[N+]1([O-])CCC(O)(c2ccc(Cl)cc2)CC1)(c1ccccc1)c1ccccc1
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}