Task: Please answer the multiple choice question.
Question: Which molecule has the highest acute oral toxicity (LD50 in rats)?
Constraint: Even if you are uncertain, you must pick either a, b, c, d, or e without using any additional words.
Options:
[a] CCCCCCCC(=O)OCC(COC(=O)CCCCCCC)OC(=O)CCCCCCC
[b] CC=COCC
[c] O=C(NC(=O)c1c(F)cccc1F)Nc1cc(Cl)c(Oc2ncc(C(F)(F)F)cc2Cl)c(Cl)c1
[d] CN(C)N
[e] CCCCS(=O)(=O)NC1CCCCC1
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}