The Great Stupa at Sanchi is one of the oldest stone structure in India and was originally commissioned by the emperor Ashoka in 3rd Century BCE. He erected the Great Stupa here after redistribution of mortal remains of Lord Buddha for erecting several stupas all over the country in order to spread Buddhism.
This stupa was originally a low structure of brick. It is also known as Kakanava and Kakanadabota. Since the fourteenth century Sanchi remained deserted and uncared for till 1818 when General Taylor rediscovered the site.
Sir John Marshall established an archaeological museum in 1919, which was later transformed into the present site museum at Sanchi.

Hawa Mahal is a palace in Jaipur.
Jantar Mantar (there are many, but the famous one) is in Delhi.
The Panch Mahal is known as the wind catcher tower. It was commissioned by sikarwar rajputs.
This is an extraordinary structure employing the design elements of a Buddhist Temple; entirely columnar, consisting of four stories of decreasing size arranged asymmetrically upon the ground floor. It is also called “THE DREAM OF STONES”
Naqqar khana was a drum house from where ceremonial music was played in Mughal palaces.

1 and 3 are correct.
Guru Nanak (15 April 1469 – 22 September 1539) was the founder of Sikhism and is the first of the ten Sikh Gurus.
Compositions of Guru Nanak and other Sikh gurus and the writings of other figures like Shaikh Farid, Sant Kabir, Bhagat Namdev were compiled in Guru Granth Sahib, the holy scripture of the Sikhs.
Nanak is said to have travelled far and wide across Asia teaching people the message of ik onkar (‘one God’), who dwells in every one of his creations and constitutes the eternal Truth. He believed that God is Formless (Nirankar).

The Tirukkural is a classic Tamil language text consisting of 1,330 couplets or Kurals. Considered one of the greatest works on ethics and morality, it is known for its universality and secular nature. Its authorship is traditionally attributed to Valluvar, also known in full as Thiruvalluvar. The text has been dated variously from 300 BCE to 5th century CE.

Statements 2 and 3 are correct.
The Indian Digital Heritage (IDH) Project was a unique initiative of the Department of Science & Technology (DST), Government of India, supporting collaborative projects between researchers in the areas of technology and humanities for the digital documentation and interpretation of our tangible and intangible heritage.
The basic goal of the IDH project was to bring about a fine synergy of Geospatial technologies with matured ICT technologies and develop technology tools to help preserve, use, and experience India’s vast heritage in digital form.
The World Heritage Site of Hampi in Karnataka, the capital of the Vijayanagara empire from the mid 14th to mid 16th century, provided an ideal canvas for this novel experiment with its rich, diverse and dazzling legacy of architectural ruins, temples, art and living traditions.