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, d, or e without using any additional words.
Options:
a O=c1[nH]cc(F)c(=O)[nH]1
b CP(=O)(Oc1ccc([N+](=O)[O-])cc1)c1ccccc1
c O=C1OCCC1N(C(=O)C1CC1)c1cccc(Cl)c1
d Cc1c(Cl)c(=O)oc2cc(OP(=O)(OCC(C)Cl)OCC(C)Cl)ccc12
e CCOP(=O)(OCC)SCSCC
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}