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 other words.
Options:
a: CC(C)CCCCCOP(OCCCCCC(C)C)OCCCCCC(C)C
b: CCCCCOC(=O)C=CC(=O)OCCCCC
c: ClCC1CO1
d: CC1=C(C(=O)Nc2ccccc2)S(=O)(=O)CCO1
e: CCOCCOCCCO
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}