• According to Census 2011, the average population density of Rajasthan is 200 persons per square kilometre.
• Bikaner has a population density of only 78 persons/sq km and Churu has 147 persons/sq km, both well below the state average of 200.
• In contrast, Jhunjhunu (361), Karauli (264), Alwar (438), Sikar (346), Dungarpur (368), and Kota (374) all possess densities significantly above 200.
• Hence, option 4 is the correct answer.

According to Census 2011, exactly three districts of Rajasthan have a population density of less than 100 persons per sq km: Jaisalmer (17), Bikaner (78), and Barmer (92).

• Pali: Population density is 164 persons per sq km.
• Churu: Population density is 147 persons per sq km.
• Bikaner: Population density is 78 persons per sq km, well below 100.
• Jalore: Population density is 172 persons per sq km.

As per Census 2011 data, Jhunjhunu district recorded the lowest child sex ratio (0-6 years) in Rajasthan at 837 girls per 1,000 boys, followed by Sikar (848).

• Ganganagar: Child sex ratio is 854.
• Karauli: Child sex ratio is 852.
• Sikar: Child sex ratio is 848.
• Jhunjhunu: Lowest child sex ratio in Rajasthan at 837.

Among the four options provided, Alwar district has the highest literacy rate according to Census 2011 at 70.7% (compared to Ganganagar at 69.6%, Karauli at 66.2%, and Jalore at 54.9%).

• Jalore: Has the lowest overall literacy rate in Rajasthan at 54.9%.
• Karauli: Literacy rate is 66.2%.
• Ganganagar: Literacy rate is 69.6%.
• Alwar: Literacy rate is 70.7%, the highest among the given options.