Task: Please answer the multiple choice question.
Question: Which molecule has the highest acute oral toxicity (LD50 in rats)?
Constraint: Even if you are not sure, you must pick either a, b, c, or d without using any additional words.
Options:
a) CCC(C)CC(C)C=C(C)C1OC(c2c(O)c(C3C(O)C(O)C(O)C3O)cn(C)c2=O)CC=C1C
b) C=COCCOCCOCC
c) CN1CCC23NC(=O)CC(c4cc(Cl)ccc4O2)C3C1
d) C=C(C)C(C)=O
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}