Task: Please answer the multiple choice question.
Question: Which molecule has the highest rat LD50 (oral exposure)?
Constraint: Even if you are uncertain, you must pick either a, b, c, or d without using any additional words.
Options:
a) CC(=O)Oc1cc(C(C)C)c(OCCN(C)C)cc1C
b) CCOP(=S)(OCC)Oc1ccc([N+](=O)[O-])c(Cl)c1
c) CCCOC(=O)COc1cccc(C(C)(C)C)c1
d) COP(=S)(OC)Oc1c(Cl)cc(C)cc1Cl
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}