Title: Gregorian calendar.
Question: What act did Britain use to implement the use of the Gregorian calendar?

Title: Rajasthan.
Question: How many princely states of Rajputana contain?

Title: Pharmaceutical industry.
Question: Did the US Congress call for more or less regulation of pharmaceuticals?

Title: Hyderabad.
Question:
In what region of Hyderabad is Mecca Masjid?