Name the states involvedin Ganga Action Plan.

Explanation

**Step-by-Step Solution:**

1. **Understanding the Ganga Action Plan (GAP)**: The Ganga Action Plan was initiated in April 1986 to reduce pollution in the River Ganga and protect its ecosystem.

2. **Identifying the River Ganga's Course**: The River Ganga flows from Gangotri in the Himalayas to the Ganga Sagar in the Bay of Bengal. This geographical knowledge helps in identifying the states through which the river flows.

3. **Listing the States Involved**: The states that are involved in the Ganga Action Plan are:
- **Uttaranchal (now known as Uttarakhand)**
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