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. CCCCN
b. C=CC(=O)OCCOCCOC(=O)C=C
c. O=[N+]([O-])c1ccc(-c2ccccc2)cc1
d. CCOP(=S)(OCC)OP(=S)(OCC)OCC
e. C=C(C)C(=O)OCC
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}