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, d, or e without using any additional words.
Options:
a) O=c1[nH]sc2ccccc12
b) CC(C)O
c) O=[N+]([O-])c1ccc(-c2ccccc2)cc1
d) O=P(OCC(Br)CBr)(OCC(Br)CBr)OCC(Br)CBr
e) Cc1cc2cccnc2n(-c2ccccc2)c1=O
Answer: c
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}