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: CCCCCCCCc1ccc(-c2ccc(C#N)cc2)cc1
b: CCOP(=O)(OCC)OCC
c: CCCCSP(=O)(SCCCC)SCCCC
d: C1=Nc2ccccc2Oc2ccccc21
e: CC1=CCC2CC1C2(C)C
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}