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) O=c1c(F)cn(C2CCCO2)c(=O)n1C1CCCO1
(b) CCCOP(C)(=O)SCCC
(c) c1ccc2scnc2c1
(d) CCC(Br)(CC)C(=O)OCC(Br)(Br)Br
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}