Task: Please answer the multiple choice question.
Question: Which molecule has the highest rat LD50 (oral exposure)?
Constraint: Even if you are uncertain, you must pick either a, b, c, or d without using any other words.
Options:
a.) CCCP(=O)(O)OCC
b.) CCCCCCCCCCCC(=O)OCCSC#N
c.) CCCCC(CC)CNC1CCCCC1
d.) O=C1CCc2cc(C(O)CCCN3CCN(c4cccc(Cl)c4)CC3)ccc2N1
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}