Task: Please answer the multiple choice question.
Question: Which molecule has the highest rat LD50 (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: NC=O
b: CC(=O)CC(c1ccc(Cl)cc1)c1c(O)c2ccccc2oc1=O
c: CCC(C)(C)OC(=O)Nc1ccco1
d: CC(C)(C)CON=CC1C(C(=O)OC(C#N)c2cccc(Oc3ccccc3)c2)C1(C)C
Answer: c
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}