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] CO[Si](C)(OC)c1ccccc1
[b] Nc1ccc2c(S(=O)(=O)O)cccc2c1S(=O)(=O)O
[c] O=C(Cl)c1ccc(C(=O)Cl)cc1
[d] CC(C)(OO)c1ccccc1
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}