Why does the textbook refer to the President as 'she'?

Why does the textbook refer to the President as ‘she’? Have we ever had a woman President in our country?

The book refers to the President as she shows that the highest office in India can also be occupied by a woman. Yes, we have had a woman President in our country. Pratibha Devi Singh Patil has been the only woman President of our country. She served as the 12th President (July 2007-July 2012) in our country. She was supported by United Progressive Alliance (UPA) and left parties.