Task: Please answer the multiple choice question.
Question: Which molecule has the highest LD50 in rats (oral exposure)?
Constraint: Even if you are uncertain, you must pick either a, b, c, d, or e without using any other words.
Options:
a: CC1CNCC(C)O1
b: NNC(N)=S
c: O=C(CCCCC(=O)OCC1CCC2OC2C1)OCC1CCC2OC2C1
d: CC12CC1(C)C(=O)N(c1cc(Cl)cc(Cl)c1)C2=O
e: CON=C(Cc1cccnc1)c1ccc(Cl)cc1Cl
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}