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: CCCCNC(=O)NS(=O)(=O)c1ccc(C)cc1
b: NC(=O)c1ccc([N+](=O)[O-])cc1
c: CC1CC2CN(C)CC(C2O)C1N1CCCC1
d: O=c1[nH]c(=O)[nH]c(=O)[nH]1
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}