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] CNCCC=C1c2ccccc2CCc2ccccc21
[b] CNC(=O)C(Cl)C(C)=O
[c] O=C=NCCOC(=O)OCCN=C=O
[d] O=C(CCCCC(=O)OCC1CC=CCC1)OCC1CC=CCC1
[e] CCOC(=O)CCCCCC#N
Answer: e
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}