The inflammation of renal pelvis is called
Glomerulonephritis
Renal calculi
Pyelonephritis
Oedema
Nephritis is the inflammation of the kidney. In pyelonephritis, there is inflammation of the renal pelvis. In glomerulonephritis, there is inflammation of the glomeruli of the kidney.
Hence, the correct option is pyelonephritis that is option 3.