Task: Please answer the multiple choice question.
Question: Which molecule has the highest rat LD50 (oral exposure)?
Constraint: Even if you are uncertain, you must pick either a, b, c, or d without using any additional words.
Options:
[a] O=[N+]([O-])c1ccc(O)c(Cl)c1
[b] COP(=S)(Oc1cc(Cl)c(Br)cc1Cl)c1ccccc1
[c] Cc1ccc(Oc2cc(SCC(=O)NN)ncn2)cc1
[d] CN(C)CCCN1c2ccccc2Sc2ccc(Cl)cc21
Answer: d
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}