Task: Please answer the multiple choice question.
Question: Which molecule has the highest acute oral toxicity rat LD50?
Constraint: Even if you are not sure, you must pick either a, b, c, d, or e without using any additional words.
Options:
a. CCN(CC)C(=O)Cl
b. O=[N+]([O-])OCC(CO[N+](=O)[O-])O[N+](=O)[O-]
c. COC(=O)C[N+](=O)[O-]
d. CCOP(=O)(OP(=O)(OCC)N(C)C)N(C)C
e. COS(=O)(=O)OC
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}