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] CCOCN(C(=O)CCl)c1c(C)cccc1CC
[b] CC(=O)Nc1ccc(N=NN(C)C)cc1
[c] CN(C)CCCN1c2ccccc2C(C)(C)c2ccccc21
[d] COP(=S)(OC)Oc1cc(Cl)c(Cl)cc1Cl
Answer: c
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}