Directions: Each of the questions consists of a question followed by three statements. You have to study the questions and the statements and decide which of the statements(s) is/are necessary to answer the question. 

Q:

How many workers are required for completing the construction work in 10 days?
 I. 20% of the work can be completed by 8 workers in 8 days
 II. 20 workers can complete the work in 16 days
 III. One-eighth of the work can be completed by 8 workers in 5 days

• 1
  I and II only
• 2
  II and III only
• 3
  I only
• 4
  III only
• 5
  Any one of three