Task: Please answer the multiple choice question.
Question: Which molecule has the highest acute oral toxicity rat LD50?
Constraint: Even if you are not sure, you must pick either a, b, c, d, or e without using any other words.
Options:
a. O=C1CCCC(=O)O1
b. CC[Si]1(CC)N[Si](CC)(CC)N[Si](CC)(CC)N1
c. CC1(C2CCC3(C)OC3C2)CO1
d. Cc1ccc(Cc2ccc(C)cc2)cc1
e. CCCC1C2C=CC(C2)C1C=O
Answer: b
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}