What comes next is the following pattern ?
1Z21,2Y4,3X9,4W 16,

Correct option is B

1. Numerical Part: Each number in the sequence increases by 1.
2. Alphabetical Part: The letters decrease alphabetically.
3. Squared Number: The number after the letter is the square of the numerical part.

Following this pattern, the next element would be:

• Numerical Part: 5 (as it's 1 more than 4)
• Alphabetical Part: V (as it's the next letter after W)
• Squared Number: 25 (as 5 squared is 25)

Therefore, the next element is 5V25.