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 or b without using any other words.
Options:
a) O=C(O)C(c1ccc(Cl)cc1)c1ccc(Cl)cc1
b) O=C1C2C3C=C(C(O)(c4ccccc4)c4ccccn4)C(C3=C(c3ccccc3)c3ccccn3)C2C(=O)N1Cc1ccccn1
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}