The correct answer is Hockey. 

• Sunita Lakra announced her international retirement in January 2020, Sunita Lakra is associated with Hockey sport.

• Sunita Lakra is an Indian field hockey player.
  • Lakra has represented her country by being capped in the India women's national field hockey team.
  • Lakra announced her retirement from hockey through Hockey India on 2 January 2020.
  • Lakra is a part of the 18 member squad which is playing in the 14th edition of the Women's Hockey World Cup.
  • Lakra climbed the ladder of ranks in Indian hockey with significant performances at the 17th Asian Games and the 2016 Rio Olympics. 
  • Lakra completed her 100th international match with a match also against New Zealand in 2017, in the third match of the five-match series.

• MS Dhoni:
  • Indian cricket's most successful captain with three ICC trophies has announced his retirement.
  • Dhoni made the confirmation through a video on Instagram.
• Suresh Raina:
  • He announced his retirement from international cricket on 15 August along with former India captain MS Dhoni, has spoken about the decision and also revealed the day's events.
  • Raina now only plays IPL and domestic cricket.
• Maria Sharapova :
  • Five-time Grand Slam winner Maria Sharapova, one of the world's most recognizable sportswomen, announced her retirement at the age of 32.
  • I'm saying goodbye," Sharapova said in an article for Vogue and Vanity Fair magazines.
• PV Sindhu :
  • Badminton player PV Sindhu announced her "retirement" from the sport in a lengthy tweet.
  • She choose to retire from substandard hygiene standards and our lackadaisical attitude towards the virus.
  • The Denmark Open was the final straw and she has decided to 'retire'