Conversation so far:
Did Devika Rani elope?
Devika Rani and Najm-ul-Hassan developed a romantic relationship and during the shooting schedule of Jeevan Naiya, Devika eloped with Hassan.
Who did Devika Rani elope with.
Devika Rani eloped with her co-star Najm-ul-Hassan.
Who is Najm-ul-Hassan?
Najm-ul-Hassan was Devika Rani's co-star in Jeevan Naiya.
Was Najm-ul-Hassan Devika Rani's husband?
Devika Rani was married to Himanshu Rai.

Question: Did Himanshu know they eloped?
Self-contained rewrite: Did Himanshu Rai know Devika Rani and Najm-ul-Hassan eloped?