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. CC1CC(C)(O)CC(C(O)CC2CC(=O)NC(=O)C2)C1=O
b. OCCCCO
c. NS(=O)(=O)c1cc(C(=O)O)cc(N2CCCC2)c1Oc1ccccc1
d. CCC(CC)COCCC(=O)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}