In the new umbrella scheme called Tlashtriya Yuva Sashaktikaran Karyakram (RYSK), the organization that is not merged is the National Service Scheme (NSS), which is option 3. This means that the other organizations mentioned in the options, namely Nehru Yuva Kendra Sangathan (NYKS), Youth Hostels (YH), and National Young Leaders Programme (INYLF), have been merged into the RYSK.

To provide a better understanding, let`s look at each option individually:

Option 1: Nehru Yuva Kendra Sangathan (NYKS)

This organization has been merged into the RYSK. This means that the functions and responsibilities of NYKS are now a part of the RYSK.

Option 2: Youth Hostels (YH)

Similarly, the YH organization has also been merged into the RYSK. This implies that the activities and services provided by the Youth Hostels are now part of the RYSK.

Option 4: National Young Leaders Programme (INYLF)

This organization has also been merged into the RYSK. Therefore, the program and initiatives provided by the INYLF are now under the umbrella of the RYSK.

In conclusion, the