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 (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. Hydrochlorothiazide is sold under a number of brand names, including EsidrixÂ®, HydroDIURILÂ®, MicrozideÂ®, and OreticÂ®.