Which of the phrases 1), 2), 3) and 4) given below each statement should replace the phrase printed in bold in the sentence to make it grammatically correct? If the sentence is correct as it is given and 'No correction is required' mark 5) as the answer.

Q:

The increase in premature deaths have adverse social and economic consequences.

• 1
  should have adverse
• 2
  can have adverse
• 3
  will have adverse
• 4
  could have adverse
• 5
  No correction required