Passage: Civil Dhruv variants are produced for transport, rescue, policing, offshore operations, air-ambulance, and other roles. The National Disaster Management Authority (NDMA) placed an order for 12 Dhruv helicopters equipped  with a full medical suite, including ventilators and two stretchers. In 2008, it was announced that India's Home Ministry had ordered six Dhruvs. The Oil and Natural Gas Corporation are to use the Dhruv for offshore operations. Several Indian state governments are to use Dhruvs for police and transportation duties. In March 2011, India's Directorate General of Civil Aviation released a proposed airworthiness directive asking all civilian Dhruv operators to temporarily ground their aircraft due to cracks potentially forming in the tail area, and recommended reinforcing affected areas.Following the 2011 Sikkim earthquake, four Dhruvs conducted rescue operations. In October 2011, Jharkhand's regional government appealed for Mil Mi-17 helicopters as operations of their Dhruvs had been disrupted by prolonged maintenance delays and a major crash. In October 2011, The Telegraph reported that a spate of helicopter crashes, including the Dhruv, were alleged to have been caused by low quality maintenance work performed by Pawan Hans Helicopters Ltd. In February 2012, the Home Ministry reported that the Dhruv remained grounded and that other helicopters such as the Mi-17 were being wet-leased in its place and that in the long term the Dhruv fleet is to be replaced.Six Army Dhruvs along with 18 Air Force Dhruvs were used during rescue operations after the 2013 North India floods. Their compact size, agility, ability to carry up to 16 people to heights of 10,000 feet, and to evacuate stranded people from inaccessible regions was praised. The Dhruv could carry more people from high-altitude helipads than the heavier Mi-17, and land where the lighter Bell 407 could not. Total flight time during Operation Rahat and Operation Surya Hope was 630 hours, of which 550 hours were dedicated to SAR missions.In...

Question: How many Dhruvs did India order?
six