Q:

Select the most appropriate sentence with respect to grammar and usage.

• 1
  Around 64 per cent of land used for agriculture so food crops is at risk of pesticide pollution
• 2
  An erratic monsoon season can damage the economy and affect agricultural practices
• 3
  The intensity of cyclones and hurricanes might increased in the next century due to global warming
• 4
  Robotics develop machines that can substitute for humans and replicate human actions
• 5
  None of the above