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) CC12CC=CCC1C(=O)OC2=O
b) Nc1ccc(N(c2ccccc2)c2ccc(N)cc2)cc1
c) CCCCCCCCCCCCCCCC(=O)OCC(O)C1OC(=O)C(O)=C1O
d) O=c1oc2ccccc2c(O)c1Cc1c(O)c2ccccc2oc1=O
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}