Which of the following statement is not correct regarding cathode rays `:`

Options

A. They star from the cathode and move towards the anode
B. They travel in straight line in the absence of an external electrical or magnetic field
C. Characteristics of cathoe rays do not depend upn the material of electrodes in cathode ray tube
D. Characteristics of cathode rays depend upon the nature of gas present in the cathode ray tube

Explanation

Cathode rays consist of negativity charged material particles called electrons it was discovered by william crookes. The characteristics of cathode rays do not depend upon the materia of electrodes and the nature of the gas pre sent in the cathode ray tube.