Chapter 4, Problem 10RQ

Which of the following expressions assigns true to a Boolean variable named islDValid when idNumber is both greater than 1000 and less than or equal to 9999, or else is equal to 123456?

1. $\text{isIDValid}=\left(\text{idNumber}>1000\&\&\text{idNumber}<=9999\&\&\text{idNumber}==123456\right)$
2. $\text{isIDValid}=\left(\text{idNumber}>1000\&\&\text{idNumber}<=9999\left|\right|\text{idNumber}==123456\right)$
3. $\text{isIDValid}=\left(\text{(idNumber}>1000\&\&\text{idNumber}<=9999)||\text{idNumber}==123456\right)$
4. two of these