Correct Answer: (a) 15
Solution:The language panel on Indian rupee banknotes displays the denomination of the note in 15 of the 22 official languages of India. They are from top to bottom Assamese, Bengali, Gujarati, Kannada, Kashmiri, Konkani, Malayalam, Marathi, Nepali, Oriya, Punjabi, Sanskrit, Tamil, Telugu, Urdu.