Task: Please answer the multiple choice question.
Question: Which molecule has the highest LD50 in rats (oral exposure)?
Constraint: Even if you are uncertain, you must pick either a, b, c, d, or e without using any other words.
Options:
a.) CCCCOC(=O)C=CC(=O)OCC1CO1
b.) CCC(C)(C)NC(N)=NC#N
c.) CCCCC(CC)COC(N)=O
d.) CC(=O)N1CCN(CC(=O)NN=Cc2ccc([N+](=O)[O-])o2)CC1
e.) COC(=O)N(CCCl)N=O
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}