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 CNC(=O)N1C(=O)CN=C(c2ccccc2)c2cc([N+](=O)[O-])ccc21
b CCC=CCC=CCC=CCC=CCC=CCCCC(=O)O
c Cc1cc2[nH]c(C(F)(F)F)nc2cc1Cl
d CC1=C2C(=O)OC(c3ccoc3)C2(C)CCC1
e CCOP(=S)(OCC)SCC(=O)N(C)C(N)=O
Answer: e
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}