<prompt> Microdeletion leading to instability of DNA, causing the cell to undergo degeneration is seen as a marker in which of the following cancer?Medullary carcinoma of thyroidSmall cell lung cancerGastric lymphomaColon carcinoma  <response>: Microsatellite instability is due to impaired DNA missmatch repair. It is associated with many malignancies but colon cancer has highest association. 