Task: Please answer the multiple choice question.
Question: Which molecule has the highest acute oral toxicity (LD50 in rats)?
Constraint: Even if you are uncertain, you must pick either a, b, c, d, or e without using any other words.
Options:
a. CCCCCCCCOP(OCC(CC)CCCC)Oc1ccccc1
b. CC(C)C(=O)Nc1ccc([N+](=O)[O-])c(C(F)(F)F)c1
c. c1ccc2ccccc2c1
d. O=C(CF)Nc1ccc(Br)cc1
e. CNC(=O)Oc1cccc2ccccc12
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}