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 additional words.
Options:
a COC12CC(COC(=O)c3cncc(Br)c3)CN(C)C1Cc1cn(C)c3cccc2c13
b CSC(C)=NOC(=O)N(C)SN(C(C)C)P1(=S)OCC(C)(C)CO1
c CCCCCc1cc(O)c2c(c1)OC(C)(C)C1CC=C(C)CC21
d O=C1C(CCSc2ccccc2)C(=O)N(c2ccccc2)N1c1ccccc1
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}