Task: Please answer the multiple choice question.
Question: Rank these molecules from lowest to highest acute oral toxicity rat LD50.
Constraint: You must select all options from a or b without using any other words.
Options:
[a] O=C(O)c1cc(-n2c(-c3ccccc3)cc3c2CCc2ccccc2-3)ccc1O
[b] Fc1cc(Br)c2nc(C(F)(F)F)[nH]c2c1
Answer: a
Task: Please answer the multiple choice question.
Question: Rank these molecules from lowest to highest {acute_toxicity__names__noun}.
Constraint: You must select all options from {%multiple_choice_enum%2-5%aA1} without using any {#other|additional!} words.
Options:
{SMILES%acute_toxicity%}
Answer: {%multiple_choice_result}