Task: Please answer the multiple choice question.
Question: Which molecule has the highest rat LD50 (oral exposure)?
Constraint: Even if you are not sure, you must pick either a, b, c, or d without using any other words.
Options:
a: CC(C)(C)c1ccc(CCOc2ncnc3ccccc23)cc1
b: COc1cc(C(=O)N2CCOCC2)cc(OC)c1OC
c: CCCCOC(=O)CC
d: CN1C(C(=O)Nc2ccccn2)=C(O)c2ccccc2S1(=O)=O
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}