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) CCCCOc1ccc(C(CN(C)C)C(C)CC)cc1Cl
(b) CCCCCC(C=Cn1ccnc1)OCc1ccccc1
(c) C#CCOS(=O)OC1CCCCC1Oc1ccc(C(C)(C)C)cc1
(d) NC(=O)N1c2ccccc2C=Cc2ccccc21
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}