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.) CCCP(c1ccccc1)c1ccccc1
b.) O=[N+]([O-])C(CO)(CO)CO
c.) COc1ccc2c(=O)c(C)c(-c3ccccc3)oc2c1CN(C)C
d.) CC(C)C(O)C(C)(C)CO
e.) CC(C)CCC(C)Nc1ccc(Nc2ccccc2)cc1
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}