Task: Please answer the multiple choice question.
Question: Which molecule has the highest acute oral toxicity rat LD50?
Constraint: Even if you are uncertain, you must pick either a, b, c, or d without using any additional words.
Options:
(a) Oc1ccc(-c2ccccc2)cc1CN1CCCC1
(b) C[Si]1(C)N[Si](C)(C)N[Si](C)(C)N[Si](C)(C)N1
(c) O=C(Cl)C1C2C=CC(C2)C1C(=O)Cl
(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}