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, or d without using any additional words.
Options:
a CCOC(C1=NCC(C)(C)CN1)c1cccc(Cl)c1
b CCOC(C1=NCC(CC)(CC)CN1)c1ccccc1
c CCP(=S)(Oc1ccc([N+](=O)[O-])cc1Cl)OC(C)C
d Nc1cc(N)cc(C(F)(F)F)c1
Answer: c
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}