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(O)c1cccc(N)c1
b) C=C(Cl)COP(C)(=S)Oc1ccc([N+](=O)[O-])c(C(F)(F)F)c1
c) CC(NC(=O)COc1ccc(Cl)cc1Cl)C(=O)O
d) N#Cc1cc([N+](=O)[O-])ccc1Cl
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}