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, or d without using any other words.
Options:
[a] CCOP(=O)(N=C1SCCS1)OCC
[b] O=C(OCC(O)C1COc2ccccc2O1)N1CCOCC1
[c] Cc1cccc(N2CCN(CCC(O)c3ccc4c(c3)CCC(=O)N4)CC2)c1C
[d] CCNc1nc(NC(C)C(C)C)nc(SC)n1
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}