Task: Please answer the multiple choice question.
Question: Which molecule has the highest acute oral toxicity (LD50 in rats)?
Constraint: Even if you are not sure, you must pick either a, b, c, or d without using any other words.
Options:
a: CCc1ccc(C(c2ccc(CC)cc2)C(Cl)Cl)cc1
b: N#Cc1cc(-c2ccccc2)nnc1NCCN1CCOCC1
c: CNc1c(Cl)cc(C(=O)NC2CC2)cc1Cl
d: CC1(C)Cc2cccc(OC(=O)NCSc3ccc(C(C)(C)C)cc3)c2O1
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}