Books in electronic formats are commonly referred to as "e-books" or "ebooks." E-books are digital versions of printed books that can be read on electronic devices such as e-readers, tablets, smartphones, or computers. They offer the convenience of portability and easy access, allowing readers to carry an entire library in a single device.

World Polio Day is observed annually on October 24th. This day is dedicated to raising awareness about the importance of polio vaccination and efforts to eradicate polio worldwide. It is an opportunity to celebrate the progress made in the fight against polio and to renew commitments to end this crippling disease.

The NDA is located at Khadakwasla near Pune in the state of Maharashtra, India. It is the premier institution for training officers for the Indian Armed Forces. Dehradun, on the other hand, is home to the Indian Military Academy (IMA), which trains officers for the Indian Army.

Chhatrapati Shivaji Terminus (formerly known as Victoria Terminus) in Mumbai, India, was designed by the British architect Frederick William Stevens. The station, a UNESCO World Heritage Site, is a historic railway station and a remarkable example of Victorian Gothic architecture in India. It was completed in 1888 and has since been an iconic landmark in Mumbai.

The green color in the Indian National Flag signifies faith, fertility, and valor. It is associated with the greenery of the land, the prosperity of the nation, and the faith and valor of its people. The white stripe next to the green one represents truth and peace, while the saffron color at the top symbolizes courage and sacrifice. 

According to the famous Bikaner Ra Rathoran Ri, "Lapsi" was a common dish prepared on the occasion of marriage. This dish is made on the occasion of marriage in most parts of Rajasthan.

1. Four rivers (Rupangarh, Mentha, Khari, Khandela) fall into Sambhar Lake. Salt is produced on a large scale from this lake.

2. Sambhar Lake: This is a salt water lake located near Jaipur city in Rajasthan state of India. This lake is situated at an altitude of 1,200 feet above sea level.