Task: Please answer the multiple choice question.
Question: Which molecule has the highest acute oral toxicity rat LD50?
Constraint: Even if you are uncertain, you must pick either a, b, c, d, or e without using any other words.
Options:
a CCOC1CCC=CO1
b O=[N+]([O-])c1cc2c(ccc3ccccc32)o1
c Fc1ccc(C(c2ccccc2)(c2ccccc2F)n2ccnc2)cc1
d CN1C(=O)C2C=CC1c1ccccc12
e Nc1nc(N)nc(N)n1
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}