The motto of NCC (National Cadet Corps) is Unity and Discipline. This means that the NCC values and promotes unity among its cadets and encourages them to practice discipline in their actions and behavior.

Option 1, Unity and Discipline, is the correct answer because it accurately represents the core principles and values of NCC. Unity refers to the idea of coming together as a team, regardless of individual differences, to work towards a common goal. Discipline, on the other hand, emphasizes the importance of following rules, maintaining order, and developing self-control.

Option 2, Unity and Integrity, is different from the correct answer because it replaces the term "discipline" with "integrity." Though integrity is an important value, it is not specifically mentioned in the official motto of NCC.

Option 3, Unity and Command, is incorrect because it substitutes the term "discipline" with "command." While command may be a part of NCC training, it does not accurately reflect the overall motto of the organization.

Option 4, Unity and Service, is also incorrect. While service is an important aspect of NCC, it is not present in the official motto.

In conclusion, the motto of NCC is Unity and Discipline,