उत्तर प्रदेश में वैट कब से लागू किया गया है ? - How long has VAT been implemented in Uttar Pradesh? - Uttar Pradesh Me VAT Kab Se Lagu Kiya Gaya Hai ? UP GK in hindi, अर्थव्यवस्था 1 April , 2008 question answers in hindi pdf 1 April , 2006 questions in hindi, Know About 1 March , 2006 UP GK online test UP GK notes in hindi quiz book 1 January , 2008