Task: Please answer the multiple choice question.
Question: Which molecule has the highest acute oral toxicity rat LD50?
Constraint: Even if you are uncertain, you must pick either a, b, or c without using any other words.
Options:
a: CCCCSSC(Cl)C(Cl)Cl
b: FC(F)(F)c1nc2c(Br)c(Cl)c(Br)cc2[nH]1
c: CC12NC(=[NH2+])NC13N(CCC3(O)O)C(=[NH2+])NC2COC(N)=O
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}