Angry parents are demanding to know why their kids are being taught about bombs and knives at nursery schools in a north Indian state. They complain that a book on Hindi language alphabets for children aged 4 to 5 says that “B” stands for bomb and “Ch” for “Chaku,” or knife. Pictures accompany the words. Rav Authar Dixit, president of the Parents-Student Welfare Association of Gurukul Academy in Uttar Pradesh, says the national education board is investigating how such a book was cleared for private nursery schools. Javed Alam, a board official, on Sunday blamed the book publisher for the lapse. The publisher could not be immediately reached for comment.