Explanation:

- Average of 3 even numbers is 42:

- Total sum of even numbers = 42 × 3 = 126

- Average of largest and second largest even numbers is 45:

- Their sum = 45 × 2 = 90

- Smallest even number:

- Sum of two largest even numbers = 90

- Smallest = Total sum - Sum of two largest = 126 - 90 = 36

- Average of 3 odd numbers is 39:

- Total sum of odd numbers = 39 × 3 = 117

- Average of largest and second largest odd numbers is 44:

- Their sum = 44 × 2 = 88

- Smallest odd number:

- Smallest odd = Total sum - Sum of two largest = 117 - 88 = 29

- Difference between smallest even and smallest odd numbers:

- Difference = 36 - 29 = 7

?? Option:2 - 7