Task: Please answer the multiple choice question.
Question: Which molecule has the highest LD50 in rats (oral exposure)?
Constraint: Even if you are uncertain, you must pick either a, b, or c without using any additional words.
Options:
a: CCOC(=O)N(C)C(=O)CSP(=S)(OCC)OCC
b: CCCCCCCCCCCC(=O)OC1=C(c2c(C)cc(C)cc2C)C(=O)c2ccccc21
c: O=C1C(N(CO)C(=O)NCO)N(CO)C(=O)N1CO
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}