Task: Please answer the multiple choice question.
Question: Which molecule has the highest acute oral toxicity rat LD50?
Constraint: Even if you are not sure, you must pick either a, b, c, d, or e without using any additional words.
Options:
a Cc1cc(-n2c(C)nc3ccccc3c2=O)n(-c2ccccc2)n1
b O=C(Oc1cc(C(=O)Oc2cc(C(=O)OC3C(OC(=O)c4cc(O)c(O)c(O)c4)CC(O)(C(=O)O)CC3OC(=O)c3cc(O)c(O)c(O)c3)cc(O)c2O)cc(O)c1O)c1cc(O)c(O)c(O)c1
c O=C(O)c1cc2ccccc2c(Cc2c(O)c(C(=O)OCCOCCN3CCN(C(c4ccccc4)c4ccc(Cl)cc4)CC3)cc3ccccc23)c1O
d CC12CC=CCC1C(=O)OC2=O
e Cc1nc([N+](=O)[O-])cn1-c1ccc([N+](=O)[O-])cc1
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}