In the following passage, some of the words have been left out. Read the passage carefully and select the correct answer for the given blank out of the four alternatives.
The battle between attackers and the attacked is becoming still more .......(1)........ . Faced with potentially new cyber ........(2)......., the danger to India’s economic and national security is going .......(3)........geometrical progression. To be forearmed, with .......(4)........offensive cyber operations and ........(5).......cyber security, is essential.