The mother of a female student who was gang raped and killed on a Delhi bus more than five years ago supported a Thomson Reuters Foundation poll of experts on Wednesday that ranked India as the world's most dangerous country for women.

India topped the survey of 548 experts in women's issues due to the perceived high risk of sexual violence and slave labor faced by women, while war-torn Afghanistan and Syria ranked second and third followed by Somalia and Saudi Arabia.

The Ministry of Women and Child Development on Wednesday dismissed the survey as "an effort to malign the nation."