Task: Please answer the multiple choice question.
Question: Which molecule has the highest acute oral toxicity (LD50 in rats)?
Constraint: Even if you are not sure, you must pick either a, b, c, d, or e without using any additional words.
Options:
a O=[N+]([O-])c1cccc(Cl)c1
b CS(=O)(=O)c1ccc(C(O)C(CO)NC(=O)C(Cl)Cl)cc1
c CCN(CC)CCNC(=O)c1cc(Br)c(N)cc1OC
d CCOP(=S)(OCC)Oc1cc(C)c(SC)c(C)c1
e CC(C)NCC(O)c1ccc2ccccc2c1
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}