Task: Please answer the multiple choice question.
Question: Which molecule has the highest LD50 in rats (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) COCc1cc(C(C)(C)C)c(O)c(C(C)(C)C)c1
b) Nc1cc(Cl)cc(C(=O)O)c1Cl
c) Brc1cc2c(cc1Br)Oc1cc(Br)c(Br)cc1O2
d) Nc1ccccc1[N+](=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}