Task: Please answer the multiple choice question.
Question: Which molecule has the highest rat LD50 (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: COC(=O)NN=Cc1c[n+]([O-])c2ccccc2[n+]1[O-]
b: COP(=S)(OC)Oc1ccc(Sc2ccc(OP(=S)(OC)OC)c(C)c2)cc1C
c: CC(C)(C)C(=O)C(Oc1ccc(Cl)cc1)n1ccnc1
d: C=COCCSCCCC
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}