Which Sikh Guru called himself the 'Sachcha Badshah'?

Q. Which Sikh Guru called himself the 'Sachcha Badshah'?

1. Guru Hargovind
2. Guru Gobind Singh
3. Guru Teg Bahadur
4. Guru Arjun Dev

Answer: Guru Hargovind

• Guru Hargobind (19 June 1595 - 3 March 1644), revered as the sixth Nanak, was the sixth of ten Gurus of the Sikh religion.
• Guru Hargobind introduced the process of militarization to Sikhism, likely as a response to his father's execution and to protect the Sikh community.
• Guru Hargobind had the longest tenure as Guru, lasting 37 years, 9 months and 3 days.
• Other names: 

The Sixth Master
Saccha Badshah
The Master of Miri Piri