Task: Please answer the multiple choice question.
Question: Which molecule has the highest rat LD50 (oral exposure)?
Constraint: Even if you are uncertain, you must pick either a, b, or c without using any additional words.
Options:
a: O=c1nc2[nH]c(=O)[nH]cc-2[nH]1
b: Nc1ncnc2c1ccn2C1OC(CO)C(O)C1O
c: CCCn1cnc2c1c(=O)n(CCCCC(C)=O)c(=O)n2C
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}