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: CCCCCCCCCCCCc1ccccc1O
b: CCCCOCCOCCOC(=O)c1ccccc1C(=O)OCCOCCOCCCC
c: CCN(CC)C(C)CN1c2ccccc2Sc2ccccc21
d: CCCC(C)CCOC(=O)c1ccccc1C(=O)OCCC(C)CCC
Answer: c
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}