Task: Please answer the multiple choice question.
Question: Which molecule has the highest acute oral toxicity rat LD50?
Constraint: Even if you are not sure, you must pick either a, b, c, d, or e without using any other words.
Options:
a) CCCCC(CC)C(=O)O[Si](C)(OC(=O)C(CC)CCCC)OC(=O)C(CC)CCCC
b) CCCCOCCOCCOCCOCCOCCCC
c) COC(C)=NC#N
d) O=C(O)C=CC(=O)OCCO
e) Clc1ccc2nsnc2c1NC1=NCCN1
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}