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 additional words.
Options:
a. CCOP(=S)(OCC)Oc1cnccn1
b. CC1C(=O)CC2(C(C)C)CC12
c. CN1CCC23c4c5ccc(O)c4OC2C(O)C=CC3C1C5
d. O=C1CCCCCN1
e. CCOC(=O)C(C)(CC)Oc1ccc(Cc2ccc(Cl)cc2)cc1
Answer: d
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}