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

To determine which statement is not correct regarding cathode rays, we will analyze each option based on the properties of cathode rays.

### Step-by-Step Solution:

1. **Understanding Cathode Rays**:
- Cathode rays are streams of electrons emitted from the cathode in a cathode ray tube (CRT).

2. **Properties of Cathode Rays**:
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