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) CCCCCCc1ccccc1O
(b) ClCc1cccc2ccccc12
(c) C=CCOC(=O)C=Cc1ccccc1
(d) CCCCOC(=O)c1ccc([N+]([O-])=Cc2ccc(N(CC)CC)cc2)cc1
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}