challenge: What is a notable achievement of Niroshan Wijekoon in the field of badminton?
  
  A. He held the world number one ranking in badminton for 10 years
  B. He is the first badminton player to represent Sri Lanka at the Olympic Games
  C. He won the Sri Lankan National Badminton Championships singles title only once
  D. He won a gold medal at the Olympic Games
  Answer: 