Task: Please answer the multiple choice question.
Question: Which molecule has the highest rat LD50 (oral exposure)?
Constraint: Even if you are not sure, you must pick either a, b, c, or d without using any additional words.
Options:
(a) OC(c1ccccc1)(c1ccccc1)C1CCCCN1
(b) CCSc1nc(NC(C)C)nc(NC(C)C)n1
(c) COP(=S)(OC)SC(C)CSCC1CC2(Cl)C(Cl)=C(Cl)C1(Cl)C2(Cl)Cl
(d) O=C1CCOc2ccccc21
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}