Task: Please answer the multiple choice question.
Question: Which molecule has the highest acute oral toxicity (LD50 in rats)?
Constraint: Even if you are not sure, you must pick either a, b, c, d, or e without using any other words.
Options:
a: C=CCC1(C(C)CC)C(=O)NC(=O)NC1=O
b: Cc1c(Cl)cccc1Nc1ccccc1C(=O)O
c: Fc1c(Cl)ccc2[nH]c(C(F)(F)F)nc12
d: Cc1ccncc1C
e: COCC(O)Cn1ccnc1[N+](=O)[O-]
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}