Task: Please answer the multiple choice question.
Question: Which molecule has the highest LD50 in rats (oral exposure)?
Constraint: Even if you are uncertain, you must pick either a, b, c, d, or e without using any other words.
Options:
a.) CC(C)=CCC(CCN1CCCCC1)(C(N)=O)c1cccc2ccccc12
b.) CO[Si](C)(OC)OC
c.) ClCC=C(Cl)CCl
d.) CCCCNC1CCCCC1
e.) C=CCC1=C(C)C(OC(=O)C2C(C)(C)C2(C)C)CC1=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}