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) Cc1c(CC(=O)O)c2ccccc2n1C(=O)c1ccccc1
b) C=CCN(C1=NCCN1)c1c(Cl)cccc1Cl
c) Cc1cc(-n2c(C)nc3ccccc3c2=O)cc(C)c1O
d) CCC(C(c1ccc(Cl)cc1)c1ccc(Cl)cc1)[N+](=O)[O-]
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}