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, or d without using any other words.
Options:
a. CNC(=O)Oc1ccc(Cl)c2c1OC(C)(C)C2
b. CCC1C2CC3C4N(C)c5ccccc5C45CC(C2C5O)N3C1O
c. CC(SCC(=O)O)c1ccc2c(c1)Cc1ccccc1-2
d. CCOC(=O)C=CC(=O)OCC
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}