Arrange in ascending order on the basis of number in Indian
(1) Biosphere reserves
(2) Hotspots
(3) National Parks
(4) Wildlife sanctuaries

Options

A. `b rarr a rarr c rarrd`
B. `b rarr c rarr d rarr a`
C. `a rarr b rarr c rarr d`
D. `d rarr c rarr b rarr a`

Answer

To arrange the categories in ascending order based on their numbers in India, we need to first identify the number of each category:

1. **Biosphere Reserves**: 80
2. **Hotspots**: 4
3. **National Parks**: 166
4. **Wildlife Sanctuaries**: 515

Now, let's arrange these numbers in ascending order:

1. **Hotspots**: 4
2. **Biosphere Reserves**: 80
3. **National Parks**: 166
4. **Wildlife Sanctuaries**: 515

Thus, the ascending order based on the number in India is:

**Hotspots < Biosphere Reserves < National Parks < Wildlife Sanctuaries**

### Step-by-Step Solution:
1. Identify the number of each category in India.
2. List the numbers in ascending order.
3. Write down the categories corresponding to the ordered numbers.