OnlineTyari and ThinkExam hacked by a Russian Hacker

Yesterday I got an email from an anonymous email stating that -

i have all Think Exam ( and onlineytari ( databases.
there are more than 1.000.000 account on think exam,3.000.000 account in onlineytari... mail,phone number ,address,city,and all information they have.all of are real person from India and all of are interesting with exams.i think this data is very useful about your can advertise your website and services this target profiles.also have more than 300.000 questions..quiz's,PDF and many many things.
if you interesting send me mail , i can proof

That was interesting. I asked him to prove his claim. He then asked me to give a registered account on any of the above mentioned accounts.