Task: Please answer the multiple choice question.
Question: Which molecule has the highest acute oral toxicity rat LD50?
Constraint: Even if you are uncertain, you must pick either a, b, c, d, or e without using any additional words.
Options:
[a] O=C(O)CN(CCOCCOCCN(CC(=O)O)CC(=O)O)CC(=O)O
[b] O=[N+]([O-])c1cc2[nH]c(C(F)(F)F)nc2cc1Cl
[c] CCOc1ccccc1N1CCN(CCC=Cc2ccc3[nH]c(=O)ccc3c2)CC1
[d] C=CCOC(=O)CCC1CCCCC1
[e] CCOc1cc2c(cc1OCC)C1CC(=O)C(CCC#N)CN1CC2
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}