Task: Please answer the multiple choice question.
Question: Which molecule has the highest LD50 in rats (oral exposure)?
Constraint: Even if you are uncertain, you must pick either a, b, c, or d without using any other words.
Options:
[a] CCCCN1C(=O)c2cccc([N+](=O)[O-])c2C1=O
[b] O=C(O)c1ccncc1
[c] Fc1c(Cl)c(Cl)c2nc(C(F)(F)F)[nH]c2c1Cl
[d] COC(=O)N(C)C(=O)CSP(C)(=S)OC
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}