Task: Please answer the multiple choice question.
Question: Which molecule has the highest acute oral toxicity (LD50 in rats)?
Constraint: Even if you are not sure, you must pick either a, b, c, or d without using any other words.
Options:
a: c1ccc2c(c1)ncn2P(n1cnc2ccccc21)n1cnc2ccccc21
b: CC(C)=CC1C(C(=O)OCc2ccc(C)cc2C)C1(C)C
c: CC12CCCC(C)(OC1)O2
d: CCNc1nc(NC(C)C)nc(SC)n1
Answer: d
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}