Consider the following statements according to Uttarakhand Census – 2011: 1. Rudraprayag district has the least population in Uttarakhand. 2. Nainital district is at the third place in terms of population in the state of Uttarakhand. 3. Sex-ratio in Uttarakhand is 963. 4. The population density of Uttarakhand is 189. Which of the above statement(s) is/are correct?