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: NC(=S)C1CC=CCC1
b: CCOP(=S)(OCC)SC1COCCS1
c: CCC(CC)COC(=O)CCCCC(=O)OCC(CC)CC
d: CCCCCc1cc(O)c2c(c1)OC(C)(C)C1CCC(C)=CC21
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}