Hindi meaning of Facebook, WhatsApp, Instagram, Twitter

When was WhatsApp incorporated?

Which Indian actor has most followers on Twitter?

______ is the founder of Facebook.

Which of the following is the first historical monument of the world to have a twitter account ?

________has announced the launch of a service to enable NRIs to send money to beneficiaries in India using social media apps such as WhatsApp and e-mail.

The probability that a student selected at random from a class will pass in Hindi is 4/5 and the probability that he passes in Hindi and English is 1/2 . What is the probability that he will pass in English if it is known that he has passed in Hindi ?