Solution:As per Census 2001, four districts with highest sex ratio in Uttar Pradesh were -(i) Azamgarh 1020 Females/ Thousand males
(ii) Jaunpur -1014 Females / Thousand males
(iii) Pratapgarh-1004 Females / Thousand males
(iv) Deoria -1002 Females / Thousand males
Thus, it is obvious that the district with highest sex ratio in Uttar Pradesh in 2001 was Azamgarh. According to the final data of census 2011, the districts with the highest sex ratio in Uttar Pradesh are-(1) Jaunpur (1024), (2) Azamgarh (1019), (3) Deoria (1017), (4) Pratapgarh (998), (5) Sultanpur (983), (6) Mau (979).