Task: Please answer the multiple choice question.
Question: Which molecule has the highest LD50 in rats (oral exposure)?
Constraint: Even if you are not sure, you must pick either a, b, c, or d without using any additional words.
Options:
a COc1ccc2c(c1)c(CC(=O)Oc1cccc(C(F)(F)F)c1)c(C)n2C(=O)c1ccc(Cl)cc1
b O=C1CC2CC(O1)C1CCCC21
c COC12CC(COC(=O)c3cncc(Br)c3)CN(C)C1Cc1cn(C)c3cccc2c13
d CC1(C)Cc2cccc(OC(=O)NCSc3ccc(C(C)(C)C)cc3)c2O1
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}