Task: Please answer the multiple choice question.
Question: Which molecule has the highest rat LD50 (oral exposure)?
Constraint: Even if you are not sure, you must pick either a, b, c, d, or e without using any additional words.
Options:
a: Cc1ccccc1NCCO
b: C#CCOc1cccc(OC(=O)NC)c1
c: O=[N+]([O-])c1ccc(F)cc1F
d: N#CSc1cccc(C(=O)O)c1
e: CCOP(=S)(CC)Oc1ccc([N+](=O)[O-])c(C)c1
Answer: d
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}