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, or d without using any additional words.
Options:
a CCCc1ccc(C)cc1O
b COc1c(Cl)c(Cl)c([N+](=O)[O-])c(Cl)c1Cl
c Cc1ccc(CC(C)N)cc1
d CC(CN1C(=O)N(CC2CO2)C(C)(C)C1=O)OCC1CO1
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}