The right answer is B.
Cells with a segmented horseshoe-shaped nucleus are segmented nuclei are precursors of neutrophils called metamyelocytes.
Following 3 divisions, the myelocytes are transformed into metamyelocytes: the majority of protein synthesis ceases. They have a curved or elongated horseshoe or sausage core; dense chromatin. This elongated nucleus will undergo one to three pinches (strictures), to give birth to the nuclear lobes.