Task: Please answer the multiple choice question.
Question: Which molecule has the highest rat LD50 (oral exposure)?
Constraint: Even if you are not sure, you must pick either a, b, c, d, or e without using any additional words.
Options:
a. CCOC(=O)CCC#N
b. CC(=O)OCN(C)N=O
c. CC(C)CCCCCN(CCCCCC(C)C)CCCCCC(C)C
d. CC1OC(C)OC(C)O1
e. CN1C(=O)CN=C(c2ccccc2)c2cc(Cl)ccc21
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}