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 additional words.
Options:
a. O=c1c(O)c(-c2ccc(O)c(O)c2)oc2cc(O)cc(O)c12
b. CCOCCOCCO
c. OCC1CCCO1
d. C(=NC1CCCCC1)=NC1CCCCC1
e. COCCOC(=O)CCCCCCCCC(=O)OCCOC
Answer: b
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}