The correct option is B No
No, all positive integers cannot be written in the form of 4q+2
Because, 4q+2=2(2q+1)
Therefore, 4q+2 is an even number.
So, we can't write odd numbers in the form 4q+2 (where q is an integer)
Also 2q+1 is an odd number, hence the maximum power of 2 that divides 4q+1 is 1. Therefore, we can't represent the numbers divisible by 4 this form.