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 other words.
Options:
a: CCCSP(C)(=S)Oc1ccc(Cl)cc1Cl
b: CNC(=O)Oc1cc(C(C)(C)C)cc(C(C)(C)C)c1
c: c1cc(CC2CO2)cc(CC2CO2)c1
d: CCOP(=S)(NC(C)CC)Oc1cc(C)ccc1[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}