Task: Please answer the multiple choice question.
Question: Which molecule has the highest acute oral toxicity rat LD50?
Constraint: Even if you are not sure, you must pick either a, b, c, or d without using any other words.
Options:
a CCCCOCCOC(=O)COc1cc(Cl)c(Cl)cc1Cl
b CCN(CC)C(=O)c1cccc(C)c1
c CC(C)(C)NCCC(O)c1cc(C(F)(F)F)nc2c(C(F)(F)F)cccc12
d CCC(C(=O)O)c1ccc(CC(C)C)cc1
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}