Explanation:

Let’s break this puzzle down step by step:

- The word is ADVANCE.

- Vowels: A, A, E. Replace each with the next letter:

A?B, E?F.

- Consonants: D, V, N, C. Replace each with the previous letter:

D?C, V?U, N?M, C?B.

So after this replacement:

A ? B

D ? C

V ? U

A ? B

N ? M

C ? B

E ? F

The new word: B C U B M B F

Now, delete all the vowels.

Out of B, C, U, B, M, B, F, the only vowel is U. Remove it.

Left with: B, C, B, M, B, F

Count them: 6 consonants.

So, the right answer is:

Option: 4, Six