Task: Please answer the multiple choice question.
Question: Which molecule has the highest rat LD50 (oral exposure)?
Constraint: Even if you are uncertain, you must pick either a, b, or c without using any other words.
Options:
(a) CCCC(=O)OC1(C(=O)COC(=O)CC)CCC2C3CCC4=CC(=O)CCC4(C)C3C(O)CC21C
(b) O=C(CF)Nc1ccc(-c2ccccc2)cc1
(c) CN(N=O)c1ccc(N=Nc2ccccc2)cc1
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}