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 other words.
Options:
[a] CNC(=O)Oc1cc(C)cc(C(C)C)c1
[b] CC1C(=NOC(=O)N(C)SC(Cl)(Cl)Cl)SCC(=O)N1C
[c] CCOC(C1=NCC(C)CN1)c1ccc(Cl)cc1
[d] CCOC(C1=NCCCN1)c1c(Cl)cccc1Cl
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}