Task: Please answer the multiple choice question.
Question: Which molecule has the highest rat LD50 (oral exposure)?
Constraint: Even if you are uncertain, you must pick either a, b, c, d, or e without using any additional words.
Options:
a: O=[N+]([O-])c1cc([N+](=O)[O-])c(O)c([N+](=O)[O-])c1
b: Cc1ccc(C#N)cc1
c: CC(c1ccccc1)N(C)N=O
d: C#CC(C)(C)NC(=O)c1cc(Cl)cc(Cl)c1
e: C=CC=NNc1ccccc1
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}