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] Cc1cc(=O)c2c(C)ccc(C)c2o1
[b] CNCCCN1c2ccccc2CCc2ccccc21
[c] CN1CCN(C2=Nc3ccccc3Oc3ccc(Cl)cc32)CC1
[d] ON=C1C=CC(=NO)C=C1
Answer: a
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}