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 additional words.
Options:
[a] O=Cc1cccs1
[b] CC1(C)CC(NC2CC(C)(C)NC(C)(C)C2)CC(C)(C)N1
[c] OC(c1ccc(F)cc1)(c1cncnc1)c1ccccc1Cl
[d] CCNc1nc(NC(C)(C)C)nc(SC)n1
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}