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, d, or e without using any other words.
Options:
a COc1ccccc1N
b O=C(O)c1cc(I)cc(I)c1I
c CC1CC(=O)CC(C)O1
d COP(=S)(OC)SC(SP(=S)(OC)OC)c1ccccc1
e COc1ccc(SC#N)c([N+](=O)[O-])c1
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}