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. O=C(O)COc1cc(Cl)c(Cl)cc1Cl
b. CCCCCCOC(=O)Oc1ccccc1C(=O)O
c. COc1ccc(O)c(C(C)(C)C)c1
d. O=c1[nH]c2ccc(Br)cc2o1
e. O=C(c1ccc(O)c(O)c1)c1cccc(O)c1O
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}