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 other words.
Options:
a CCOP(=S)(Oc1ccc([N+](=O)[O-])cc1)Oc1ccc([N+](=O)[O-])cc1
b CCOP(=O)(OCC)SCn1nc(C)oc1=O
c ClC1=C(Cl)C2(Cl)C3C(Cl)C(Cl)CC3C1(Cl)C2(Cl)Cl
d O=C1N=C2c3ccccc3N=CN2C1=Cc1ccc([N+](=O)[O-])cc1
Answer: c
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}