context sensitive grammer

Question

it is given that in csg

if @->#

then length of @ should be less or equal to #

then how aaB->c is a csg???

Answer 1

A---> B where |A|<=|B|

So aaB-- >c is not csg.

Answer 2

This is unrestricted grammar

type-0

The productions can be in the form of α → β where α is a string of terminals and non terminals with at least one non-terminal and α cannot be null. β is a string of terminals and non-terminals.