Task: Please answer the multiple choice question.
Question: Which molecule has the highest LD50 in rats (oral exposure)?
Constraint: Even if you are uncertain, you must pick either a, b, c, or d without using any additional words.
Options:
a. c1ccc(Nc2cccc3ccccc23)cc1
b. CCC(=O)C(CC(C)N(C)C)(c1ccccc1)c1ccccc1
c. CC(=O)c1ccc2c(c1)C(=O)C1(CC1)O2
d. OC1(c2ccccc2)c2ccccc2C2=NCCN21
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}