Five sentences related to a topic are given below. Four of them can be put together to form a meaningful and coherent short paragraph. Identify the odd one out. Choose its number as your answer and key it in.

1. As India looks to increase the number of cities, our urban planning must factor in potential natural disasters and work out contingencies in advance.

2. Authorities must revise data and upgrade infrastructure and mitigation plans even if their local area hasn’t been visited by a natural calamity yet.

3. Extreme temperatures, droughts, and forest fires have more than doubled since 1980.

4. There is no denying the fact that our baseline normal weather is changing.

5. It is no longer a question of whether we will be hit by nature’s fury but rather when.