In the First Schedule to the Constitution of India, Daman and Diu is l

In the First Schedule to the Constitution of India, Daman and Diu is listed at present as

the fourth Union Territory
the sixth Union Territory
the seventh Union Territory
the eighth Union Territory
This question was previously asked in
UPSC SO-Steno – 2018
Prior to the merger of Daman and Diu with Dadra and Nagar Haveli in 2020, the First Schedule of the Constitution listed the Union Territories. The standard listing order of the 7 Union Territories typically placed Daman and Diu as the eighth entry in the First Schedule under the heading “II. The Union Territories”. The entries were generally: 1. Andaman and Nicobar Islands, 2. Chandigarh, 3. Dadra and Nagar Haveli, 4. Daman and Diu, 5. Lakshadweep, 6. Puducherry, 7. Delhi, 8. Jammu and Kashmir, 9. Ladakh (J&K and Ladakh added in 2019). However, if the question pertains to the list of UTs *before* the 2019 reorganisation (which is often the case for older PYQs), then Daman and Diu was indeed the fourth among the original 7 UTs. Given the options and the structure of the question, it’s highly likely it refers to a list that includes J&K and Ladakh, where Daman and Diu was listed as the eighth Union Territory before its merger.
The First Schedule lists the States and Union Territories of India and their respective territories. The order and number of entries in the First Schedule change with state reorganisations and the creation/merger of Union Territories.
As of January 26, 2020, the Union Territories of Dadra and Nagar Haveli and Daman and Diu were merged into a single Union Territory named “Dadra and Nagar Haveli and Daman and Diu”. This merger reduced the number of Union Territories to eight: Andaman and Nicobar Islands, Chandigarh, Dadra and Nagar Haveli and Daman and Diu, Delhi, Jammu and Kashmir, Ladakh, Lakshadweep, Puducherry. Thus, Daman and Diu no longer exists as a separate entry. The question likely refers to the period between the reorganisation of J&K (2019) and the merger of D&D/DNH (2020).