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(=O)NNc1ccc(N)cc1
b.) O=C(Cl)c1ccc(Cl)cc1Cl
c.) CC(=O)c1cccc(Oc2ccccc2)c1
d.) CCOP(=S)(CC)Sc1ccc(C)cc1
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}