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) O=C=NC1CCC(CC2CCC(N=C=O)CC2)CC1
b) O=[N+]([O-])c1cncn1CCN1CCOCC1
c) O=[N+]([O-])c1cc(C2CCCCC2)c(O)c([N+](=O)[O-])c1
d) OC1CCCc2ccccc21
e) Cc1ccccc1NC(=N)Nc1ccccc1C
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}