So, basically, withholding information is not the same thing as lying, but depending on the situation, you will have to decide whether it is better to withhold the information or not.
HCH may refer to: Hampton Court House, an independent school in Surrey, UK. Hexachlorocyclohexane, a group of chemical compounds. Holmes Chapel railway station (National Rail station code), in Cheshire, England.
Synonyms: Mean Cell Hemoglobin. Use: The MCH test measures the amount of hemoglobin in red blood cells and is another measure of cell size. The MCH test is used to determine the presence and cause of anemias, such as normochromic anemia or hyperchromic anemia. Limitations: An extremely elevated white blood cell count may cause an increased MCH value.