__Pressure gauges are never connected directly to the live steam line; rather a loop or syphon is interposed as close as possible to the pressure gauge. This is done to__

• A. Avoid the overheating of the tubes & bellows which operate them to minimise error and damage
• B. Form a seal of water by steam condensate to fill the tube or bellows at the pressure being measured
• C. Both 'a' & 'b'
• D. Avoid the static head error introduced by steam entry