Answer:

Introduction:
The question asks for the number that comes after 5. In this case, we need to identify the number that follows 5 in the series of natural numbers.

Series of Natural Numbers:
Natural numbers are a sequence of positive integers that start from 1 and continue indefinitely. The series of natural numbers is as follows:
1, 2, 3, 4, 5, 6, 7, 8, 9, ...

Identifying the Number:
To find the number that comes after 5, we need to look at the sequence of natural numbers and determine the next number in the series. From the given options, we can analyze each option to find the correct answer.

- Option a) 6: This option suggests that the number following 5 is 6. By looking at the series of natural numbers, we can confirm that 6 indeed comes after 5.
- Option b) 7: This option suggests that the number following 5 is 7. However, this is incorrect as 6 is the correct number.
- Option c) 4: This option suggests that the number following 5 is 4. This is incorrect as 6 is the correct number.
- Option d) 0: This option suggests that the number following 5 is 0. This is incorrect as 6 is the correct number.

Conclusion:
After analyzing the given options and considering the series of natural numbers, we can conclude that the correct answer is option 'a' which is 6.