The following is an implementation for the Readers$-$Writer problem. Which of the following statement is correct?

Choice $1$ of $5$:This implementation is incorrect because race conditions still can happen

Choice $2$ of $5$:This is a correct implementation

Choice $3$ of $5$:This implementation may cause deadlock and starvation

Choice $4$ of $5$:This implementation may cause starvation

Choice $5$ of $5$:This implementation may cause deadlock