Task: Please answer the multiple choice question.
Question: Which molecule has the highest acute oral toxicity rat LD50?
Constraint: Even if you are uncertain, you must pick either a, b, c, d, or e without using any other words.
Options:
a: CCOCCC(OCC)OCC
b: CCOC(=S)SSSSC(=S)OCC
c: CCO[Si](CCCCN)(OCC)OCC
d: C=CC1(C)OC(=O)N(c2cc(Cl)cc(Cl)c2)C1=O
e: CN(C)CCOC1=Cc2ccccc2Sc2ccc(Cl)cc21
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}