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)C=C1SC(N2CCCCC2)C(=O)N1C
b: O=Cc1ccccc1O
c: O=C1c2ccccc2-c2ccc3c4c(O)c(O)c5c6c(ccc(c7ccc1c2c73)c64)C(=O)c1ccccc1-5
d: CC(=Cc1ccccc1)CC(=O)NCCO
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}