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, d, or e without using any additional words.
Options:
a: CCCCOCCOCCOCCOCCOCCCC
b: CCOP(=O)(OC=CCSCC)OCC
c: CC1=C(C(C)C)CCCC1
d: CCCCP(CCCC)CCCC
e: CCCCOP(=O)(OCCCC)Oc1ccc2c(C)c(Cl)c(=O)oc2c1
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}