Degaussing in a picture tube means

[A].	Adding magnetism in mask and mounting frame
[B].	Removing residual magnetism in mask, shield etc...
[C].	Increasing resistance of coils to decrease time constant
[D].	Decreasing resistance of coils to increase time constant.

Answer: Option B

Explanation:

Since gauss is a unit of magnetic flux, degaussing means removal of magnetism.