Directions: The sentences given below, when properly sequenced, form a coherent paragraph. Each sentence is labelled with a number. Choose the most logical order of sentences from among the four given choices to construct a coherent paragraph.

1. The history of mankind is full of such fighting between communities, nation & people.
   
2. From the primitive weapons of warfare, man has advanced to the modern nuclear weapons.
3. Ever since the dawn of civilisation man has been fighting with man.
4. A modern war is scientific in character, but the effect is the same wiping human existence out of this Earth.
5. The only difference now seems to be in the efficiency of the instruments used for killing each other