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, d, or e without using any additional words.
Options:
a.) O=C1c2ccccc2N(C(=O)CN2CCOCC2)CN1c1ccccc1
b.) CCCCOCCOCCOC(C)=O
c.) CCCCCCOCCCCCC
d.) ClCC(Br)CBr
e.) O=S1c2ccccc2N(CCCN2CCN(CCO)CC2)c2cc(Cl)ccc21
Answer: a
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}