Explanation:

Let’s break down the pattern in the given series:

- BOARD

- BOARW

- BOAIW

- ?

- BLZIW

- YLZIW

Here’s what’s happening:

- The last two letters in the cluster shift from RD ? RW ? IW and then remain "IW".

- The first three letters change one by one:

- B O A R D

- B O A R W (Last letter D ? W)

- B O A I W (Fourth letter R ? I)

- ?

- B L Z I W (First three: B ? B, O ? L, A ? Z)

- Y L Z I W (First letter B ? Y)

Let’s check each option:

1. BLZRW – Would break the “IW” at the end.

2. BOZRW – Last two letters “RW,” but the pattern moves to “IW” before this point.

3. BOAIW – This repeats the third term, but a new term is needed.

4. BOZIW – Keeps “IW,” and changes the third letter A?Z, which follows the pattern.

So, the correct option is:

Option:4- BOZIW