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 other words.
Options:
a CC(C)(CNc1ccc(N=O)cc1)[N+](=O)[O-]
b CC(C)(Oc1ccccc1)C(=O)OCCN1CCOCC1
c O=C(O)CC(NC(=O)COc1ccc(Cl)cc1Cl)C(=O)O
d CN(C)c1ccc(SC#N)cc1
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}