Which one of the following TCA cycle intermediate may not be added or removed by other metabolic pathways?

Oxaloacetate may be formed from pyruvate during gluconeogenesis. Degradation of tyrosine and phenylalanine may produce fumarate. Citrate is transpoed out of mitochondria to be used as a source of cytoplasmic acetyl CoA. Isocitrate is formed and removed in TCA cycle. Ref: Textbook of Biochemistry for Medical Students by D.M. Vasudevan, 6th Edition, Page: 218