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] CC1(C)Cc2cccc(OC(=O)NCSc3ccc(Br)cc3)c2O1
[b] O=C(O)Cc1ccc2c(c1)OCc1ccccc1C2=O
[c] CC(C)OC(=O)C(O)(c1ccc(Br)cc1)c1ccc(Br)cc1
[d] COc1ccccc1N1CCN(CCCc2ccc3c(c2)CCC(=O)N3)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}