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, or d without using any other words.
Options:
a. Nc1cc(Cl)c(N)c(Cl)c1
b. O=[N+]([O-])c1ccc(Cl)cc1
c. NNC(=O)CSc1cc(Oc2ccc(Cl)cc2)ncn1
d. Nc1cccc2cc(S(=O)(=O)O)ccc12
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}