Task: Please answer the multiple choice question.
Question: Which molecule has the highest acute oral toxicity (LD50 in rats)?
Constraint: Even if you are uncertain, you must pick either a, b, c, or d without using any additional words.
Options:
a. CCOC(=O)C1(c2ccccc2)CCCN(C)CC1
b. CC1=C2C(=O)OC(c3ccoc3)C2(C)CCC1
c. CCOC(=O)C1=C(C)NC(C)=C(C(=O)OCC)C1C1=COCCO1
d. CS(C)=O
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}