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, d, or e without using any other words.
Options:
a: OCC(Br)CBr
b: CCCC(=O)OCC
c: FC(F)(F)c1nc2cc(Br)ccc2[nH]1
d: CC=C(C=O)CC
e: CCOP(=S)(OC(C)C)SCN1C(=O)c2ccccc2C1=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}