4.2 on the number line lies between: 

The place value table of 4.0, 4.2, and 4.4 is given below:


The tenths place, we have 0 < 2 < 4

Therefore, 4.2 is more than 4.0 but less than 4.4

So, 4.2 will lie between 4.0 and 4.4 on the number line.


∴ 4.2 is represented by the alphabet C on the number line.