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.) O=C1CNC(=S)N1
b.) CNc1nc(NC(C)C)nc(OC)n1
c.) CN(C)C1c2ccccc2NC(=O)c2ccccc21
d.) CN(C)C1c2ccccc2NC(=O)c2ccccc21
Answer: c, d
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}