Task: Please answer the multiple choice question.
Question: Which molecule has the highest acute oral toxicity (LD50 in rats)?
Constraint: Even if you are not sure, you must pick either a, b, c, d, or e without using any other words.
Options:
a. Cc1ncc([N+](=O)[O-])n1CCO
b. CCOP(=O)(NC(C)C)SCC(=O)NCOC
c. CC(C)(C)c1cc([N+](=O)[O-])cc([N+](=O)[O-])c1Nc1ccc([N+](=O)[O-])cc1[N+](=O)[O-]
d. CC(C)(C)C(=O)O
e. N#CCCNC(=O)CCl
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}