Task: Please answer the multiple choice question.
Question: Which molecule has the highest acute oral toxicity rat LD50?
Constraint: Even if you are not sure, you must pick either a, b, c, or d without using any other words.
Options:
(a) FC(F)(F)c1cccc(C2CNCCO2)c1
(b) Clc1cccc(Sc2ccccc2)c1
(c) CC12NC(=[NH2+])NC13N(CCC3(O)O)C(=[NH2+])NC2COC(N)=O
(d) CN(C)CCC[N+]1([O-])c2ccccc2CCc2ccccc21
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}