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, d, or e without using any other words.
Options:
a: CCN(CC)CCSSCCN(CC)CC
b: C#CCOC(=O)CCCCC(=O)OCC#C
c: N#CCCC#N
d: CC[Si](N(C)C)(N(C)C)N(C)C
e: Nc1ccc(O)c2c1C(=O)c1c(N)c(Br)cc(O)c1C2=O
Answer: c
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}