Q:

It has been declared in the Preamble to the Indian Constitution that India is a secular republic. 

• 1
  The Preamble to the Indian Constitution is declaring India to be a secular republic.
• 2
  The Preamble to the Indian Constitution has been declaring India a secular republic.
• 3
  The Preamble to the Indian Constitution had declared India as a secular republic.
• 4
  The Preamble to the Indian Constitution has declared India as a secular republic.