Task: Please answer the multiple choice question.
Question: Which molecule has the highest LD50 in rats (oral exposure)?
Constraint: Even if you are not sure, you must pick either a, b, c, or d without using any additional words.
Options:
a CCP(=O)(OC)Oc1ccc([N+](=O)[O-])cc1
b CN(C)CCCN1c2ccccc2Sc2ccc(Cl)cc21
c BrC(Br)(Br)c1ccc2ccccc2n1
d CCOP(=S)(OCC)Oc1ccc([N+](=O)[O-])c(C)c1
Answer: b
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}