Task: Please answer the multiple choice question.
Question: Which molecule has the highest acute oral toxicity (LD50 in rats)?
Constraint: Even if you are uncertain, you must pick either a, b, c, or d without using any additional words.
Options:
[a] O=C(OCCCl)c1ccccc1C(=O)OCCCl
[b] O=C=Nc1ccc(Cl)cc1
[c] CCOP(=O)(OCC)Sc1c(Cl)c(Cl)c(Cl)c(Cl)c1Cl
[d] O=C(O)c1cc(S(=O)(=O)O)ccc1O
Answer: c
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}