Task: Please answer the multiple choice question.
Question: Which molecule has the highest LD50 in rats (oral exposure)?
Constraint: Even if you are uncertain, you must pick either a, b, c, d, or e without using any other words.
Options:
a) COC(=O)C1C2CC3c4[nH]c5cc(OC)ccc5c4CCN3CC2CC(OC2CCCCO2)C1OC
b) Nc1cc[n+]([O-])cc1
c) CC=C1CC(C)C(O)(CO)C(=O)OCC2=CC[N+]3([O-])CCC(OC1=O)C23
d) CCCCC(CC)COC(CBr)c1cccc(C2CCCCC2)c1
e) Cc1cncc(C)n1
Answer: b
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}