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, or d without using any additional words.
Options:
a. CC1(NC(N)=O)CCCC1
b. CCOc1ccc(Cl)cc1C(CN1CCCCC1)C(C)CC
c. COC(C1=NCCCN1)c1ccc2ccccc2c1
d. CCc1ccc(C)[n+]([O-])c1
Answer: c
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}