Task: Please answer the multiple choice question.
Question: Which molecule has the highest LD50 in rats (oral exposure)?
Constraint: Even if you are not sure, you must pick either a, b, c, or d without using any other words.
Options:
a.) C[n+]1cccc(C(=O)[O-])c1
b.) Cc1ccc(O)c(C2CCCCC2)c1
c.) C[Si]1(C)N[Si](C)(C)N[Si](C)(C)N[Si](C)(C)N1
d.) CCCCCC(O)C=CC1C(O)CC(O)C1CC=CCCCC(=O)O
Answer: a
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}