Which of the following statement(s) is (are) not correct ?
i. The $2$’s complement of $0$ is $0$.
ii. In $2$’s complement, the left most bit cannot be used to express a quantity.
iii. For an $n$-bit word ($2$’s complement) which includes the sign bit, there are $2^{n-1}$ positive integers, $2^{n+1}$ negative integers and one 0 for a total of $2^{n}$ unique states.
iv. In $2$’s complement the significant information is contained in the $1$’s of positive numbers and $0$’s of the negative numbers.
- $i$ & $iv$
- $i$ & $ii$
- $iii$
- $iv$