Task: Please answer the multiple choice question.
Question: Which molecule has the highest LD50 in rats (oral exposure)?
Constraint: Even if you are uncertain, you must pick either a, b, or c without using any additional words.
Options:
a: Cc1nnc(-c2ccccc2)c(=O)n1N
b: CN(C)C(=O)NC1CCCCCCC1
c: Cn1cnc2c1c(=O)n(CCCN1CCN(c3ccc(Cl)c(Cl)c3)CC1)c(=O)n2C
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}