Task: Please answer the multiple choice question.
Question: Which molecule has the highest LD50 in rats (oral exposure)?
Constraint: Even if you are uncertain, you must pick either a, b, c, d, or e without using any additional words.
Options:
a) O=S(=O)(Oc1ccc(Cl)cc1)c1ccccc1
b) OCC[Si](CCO)(CCO)CCO
c) CC(C)(C)C(=O)CCl
d) OCC#CCO
e) O=[N+]([O-])OCC(CO[N+](=O)[O-])O[N+](=O)[O-]
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}