In addition, India has the most child brides in the world - around a third of all girls are married before their 18th birthday - and its own government estimated earlier this year that there are 63 million "missing" women in the country due to sex-selective abortion as well as 21 million unwanted girls.
Reported rapes in India - 38,947 in 2016 - are on the rise, but its rate of rape per 100,000 people remains far lower than some Western countries, including the United States, which experts believe is in part due to years of fear and underreporting.
The study kicked up a political debate when India's chief opposition leader, Rahul Gandhi, was criticised Tuesday for tweeting that while the prime minister "tiptoes around his garden making Yoga videos" a reference to Prime Minister Narendra Modi's recent fitness video - "India leads Afghanistan, Syria & Saudi Arabia in rape & violence against women. What a shame for our country!"
His supporters quickly dug up old tweets from Modi in 2011 - the last time the survey was done - lamenting the fact that India had ranked fourth then.
narendramodi_in tweeted "India is considered 4th most dangerous for women. When will she feel safe & symbol of positivity?"
"Moral of the story: the rankings are not the issue here, they're absurd," journalist Nidhi Razdan tweeted, safety of women "has been an issue for years under both governments."
In April, Modi's top lieutenant, Amit Shah, defended his boss's record on women at a rally, saying that in India "women have a status of a deity" and that the government had instituted many programs to help them - such as Modi's ambitious plan to put a toilet in every Indian home - as well as the country's move to toughen punishments for child rapists after the brutal murder and gang rape of an 8-year-old girl earlier this year that shocked the country.