The philadelphia chromosomes appear in?
a- fibrosarcoma
b-chronic myelogous carcinoma
c-adenocarcinoma
d-small c ell carcinoma

The answer is B.

Chronic myelogenous cancer, also known as Chronic myelogenous leukemia  (CML) is associated with an abnormal chromosome called the Philadelphia chromosome.

Most cases of CML start when a "swapping" of chromosomal material (DNA) occurs between chromosome 9 and 22 during cell division. Part of chromosome 9 goes to 22 and part of chromosome 22 goes to 9. 

This is called a translocation and gives rise to a chromosome 22 that is shorter than normal. This new abnormal chromosome is called the Philadelphia chromosome  and it is found in the leukemia cells of almost all patients with CML.

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