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 other words.
Options:
a. Nc1nc2cc(Br)ccc2o1
b. O=C(CN1CCN(CCc2ccccc2)CC1)NN=Cc1ccc([N+](=O)[O-])o1
c. Nc1nc2cc(Cl)ccc2o1
d. NC(=O)NO
e. Nc1ccc(S(=O)(=O)Nc2ccc(NC(=O)CCC(=O)O)cc2)cc1
Answer: c
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}