Task: Please answer the multiple choice question.
Question: Which molecule has the highest rat LD50 (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: Cc1c(Cl)cccc1Nc1ncccc1C(=O)O
b: CCCCCCCCCCCCN1CCN(CC(=O)NN=Cc2ccc([N+](=O)[O-])o2)CC1
c: O=C(OCC1CO1)c1ccccc1C(=O)OCC1CO1
d: C=CBr
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}