The correct answer is D. All of these.
Mary Kom, Vinesh Phogat, and Sakshi Malik are all Indian female wrestlers who were expected to qualify for the 2016 Rio Olympics. However, none of them were able to do so.
Mary Kom was the first Indian woman to win a World Boxing Championship title, and she has also won six Asian Games gold medals. She was considered to be one of the favorites to win a medal at the 2016 Olympics, but she lost in the quarterfinals.
Vinesh Phogat is a two-time Commonwealth Games gold medalist and a World Championship bronze medalist. She was also considered to be a medal contender at the 2016 Olympics, but she suffered a knee injury in her first match and was forced to withdraw from the competition.
Sakshi Malik is a bronze medalist from the 2014 Commonwealth Games and the 2015 Asian Wrestling Championships. She was the first Indian woman to win a medal at the World Wrestling Championships, and she was also the first Indian woman to qualify for the Olympics in wrestling. However, she lost in the quarterfinals of the 2016 Olympics.
The failure of Mary Kom, Vinesh Phogat, and Sakshi Malik to qualify for the 2016 Olympics was a major disappointment for Indian wrestling. It showed that the sport was still struggling to produce world-class athletes, and it raised questions about the future of Indian wrestling.