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 other words.
Options:
a CN(CCC(N)CC(=O)NC1C=CC(n2ccc(N)nc2=O)OC1C(=O)O)C(=N)N
b COC(=O)CCC(Br)C(C)=O
c O=C1C=CC(=O)N1c1ccc(Cl)cc1
d CCc1nc(N)nc(N)c1-c1ccc(Cl)cc1
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}