Task: Please answer the multiple choice question.
Question: Which molecule has the highest acute oral toxicity rat LD50?
Constraint: Even if you are uncertain, you must pick either a, b, c, or d without using any other words.
Options:
[a] CC(C)c1ccccc1
[b] Nc1ccc(Cl)cc1
[c] ClC1=C(Cl)C2(Cl)C3C(Br)C=CC3C1(Cl)C2(Cl)Cl
[d] Cc1ccc(N)cc1Br
Answer: a
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}