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, or d without using any other words.
Options:
a. CC(C)c1cc([N+](=O)[O-])cc([N+](=O)[O-])c1O
b. CCCSP(=O)(OCC)Oc1ccc(Br)cc1Cl
c. Clc1ccc(Cl)cc1
d. O=[N+]([O-])c1ccc(O)c(Cl)c1
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}