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) CCN(CCO)CCO
b) CC=C(C=O)CC
c) CCOP(=S)(OCC)ON1C(=O)c2cccc3cccc(c23)C1=O
d) CC(Cc1ccc(C(C)(C)C)cc1)CN1CCCCC1
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}