Task: Please answer the multiple choice question.
Question: Which molecule has the highest acute oral toxicity rat LD50?
Constraint: Even if you are not sure, you must pick either a, b, c, or d without using any other words.
Options:
a OCC(CO)(CBr)CBr
b Fc1c(F)c(F)c2[nH]c(C(F)(F)F)nc2c1F
c C=CC#CC(C)(C)O
d FC(F)(F)COC1CCC(Cn2cncn2)(c2ccc(Cl)cc2Cl)O1
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}