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 other words.
Options:
[a] C=CCOC(=O)CC(C)CC(C)(C)C
[b] O=CC(O)C1OC(=O)C(O)C1O
[c] CCc1occc(=O)c1O
[d] CCCC(C)C1(CC)C(=O)NC(=O)NC1=O
Answer: a
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}