Question

what are the basic unist involve it​

Answer 1

Answer:

But for which u want an unit.

Check ur questions something is missing.

Answer 2

$\huge \frak{Answer}$

1) The term you are reaching for is “base unit”, not basic unit.

2) All SI units start with a lower case letter.

3) Look up the SI Brochure 9. It defines all things SI. It really is quite easy.