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 other words.
Options:
a COc1ccc(NC(=O)CC(C)=O)cc1
b CCOP(=S)(OCC)SCSCc1ccccc1
c CCOC(=O)C=C1SC(N2CCCCC2)C(=O)N1C
d C1C2OC2C2C1C1CC2C2OC12
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}