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, or d without using any other words.
Options:
a) CCCC(c1cc(C)cc(C)c1O)c1cc(C)cc(C)c1O
b) O=[N+]([O-])c1cncn1CCN1CCOCC1
c) Cn1cnc2c1c(=O)[nH]c(=O)n2C
d) O=C(CCc1ccccc1)OC1=C(OC(=O)CCc2ccccc2)C(=O)OC1=O
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}