Total number of districts in Puducherry is

Puducherry Union Territory consists of a total of 4 districts. These are:
1. Puducherry (or Pondicherry)
2. Karaikal
3. Mahe
4. Yanam

These four districts are geographically non-contiguous, meaning they are not located next to each other. Each district is surrounded by different states:
Puducherry and Karaikal are located within Tamil Nadu
Mahe is located in Kerala
Yanam is located in Andhra Pradesh

Despite being far apart, all four districts are part of the same Union Territory and are administered centrally from Puducherry.

The other options — 3, 5, and 6 — are incorrect as they do not reflect the actual administrative structure of Puducherry.

Therefore, the total number of districts in Puducherry is 4.