The picture tube of a black and white T.V. set has only one electron ‘gun’ that produces the picture on its screen. The number of electron ‘gun’ a colour picture tube has is:

The picture tube of a black and white T.V. set has only one electron ‘gun’ that produces the picture on its screen. The number of electron ‘gun’ a colour picture tube has is:

A. Three

B. Six

C. Four

D. Five

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