The Indian national calendar is based on:

Correct option is B

The correct answer is (b) Saka Era

Explanation:

• The Indian National Calendar, also known as the Saka Calendar, is officially used by the Government of India alongside the Gregorian Calendar.
  It was adopted on March 22, 1957, following the recommendations of the Calendar Reform Committee, chaired by Meghnad Saha.

Information Booster:

• Months in the Saka Calendar: Chaitra, Vaisakha, Jyeshtha, Ashadha, Shravana, Bhadrapada, Ashwin, Kartika, Agrahayana, Pausha, Magha, and Phalguna.
• The Saka Era, also known as the Shaka Era, is a historical calendar system that began in 78 CE. It signifies the emergence of the Saka dynasty, a Central Asian power that ruled parts of present-day India.

Additional Knowledge:

• Christian Era: Refers to the Gregorian calendar, widely used worldwide, starting from the birth of Christ (Anno Domini - AD).
• Vikram Era: Also known as Vikram Samvat, it began in 57 BCE, traditionally associated with King Vikramaditya.
• Hijri Era: An Islamic lunar calendar starting from 622 CE, the year of Prophet Muhammad’s migration (Hijra) from Mecca to Medina.