Which of the following statements are correct about canal rays?
• [(i)] They carry positively charged particles.
• [(ii)] The mass of the particles of these rays does not depend upon the gas present in the cathode ray tube.
• [(iii)] The particles behave in a different manner in electric field as those of cathode rays.
• [(iv)] The charge to mass ratio of the particles does not depends on the gas present in the cathode ray tube.