which part means the boundaries of plates?

 yes , i checked it is given u must see 

Not only Gujrat and Himalayas, Runn of Kutch, Rajasthan, Indo Gangetic Planes also lie under weak or siesmic or fault zones.

the seismic /fault zones

The fault zones or weak zones are the boundaries of plates.

India was once an island. When it collided with the rest of the Asia, the earthquake was so strong that it produced a powerful upward force giving birth to the Himalyas; they are still rising very slowly.

Thus, this Himalyan region is a fault zone or seismic zone.