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.
Hydrochlorothiazide is used for the treatment of high blood pressure and fluid retention. Hydrochlorothiazide (HCTZ) is a prescription medicine that is used to treat high blood pressure and fluid retention. It is part of a class of medicines known as diuretics.