ANS:B - 21

The explanation describes a pattern where each number corresponds to the numerical value of the vowels in the alphabet. Here’s how you can understand and apply this pattern:

Explanation of the Pattern:

1. Vowels in the Alphabet:
   • The English vowels are A, E, I, O, U.
2. Numerical Values of Vowels:
   • Assign numerical values to each vowel based on their position in the alphabet:
     • A = 1
     • E = 5
     • I = 9
     • O = 15
     • U = 21
3. Pattern Interpretation:
   • The numbers in the given sequence or context represent the values assigned to these vowels.

Applying the Pattern:

To determine the number or verify it based on the pattern, follow these steps:

1. Identify Vowels:
   • Determine which vowels are being referenced or included.
2. Use Vowel Values:
   • Convert each vowel to its corresponding numerical value using the assignments.
3. Sum or Use Values:
   • If required, add the values of multiple vowels to match the given number.

Example:

If you are given a number and need to determine its relation to vowels, consider:

• Number 21:
  • Check if it corresponds to a vowel value:
    • The value of U is 21.

Thus, 21 represents the numerical value of the vowel U.

Conclusion:

The correct answer is 21 because it matches the numerical value assigned to the vowel U in the alphabet. This pattern helps in associating numbers with specific vowels based on their position in the alphabet.