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) CCOP(=S)(OCC)Oc1cnn(C)c(=O)c1OC
(b) COP(=O)(OC)OC(=CCl)c1cc(Cl)c(Cl)cc1Cl
(c) O=C(Cl)c1ccc(C(=O)Cl)cc1
(d) N#Cc1cccc([N+](=O)[O-])c1C#N
Answer: b
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}