Directions (81-90): In the following passage, some of the words have been left out, each of which is indicated by a number. Find the suitable word from the options given against each number and fill up the blanks with appropriate words to make the paragraph meaningfully complete. The number of _____(81)_____ stretches in India’s rivers has _____(82)_____ to 351 from 302 two years ago, and the number of critically polluted stretches — where water quality indicators are the _____(83)_____ — has gone _____(84)_____ to 45 from 34, according to an _____(85)_____ by the Central Pollution Control Board (CPCB). While the Rs. 20,000 crore clean-up of the Ganga may be the most _____(86)_____ of the government’s efforts to _____(87)_____ pollution, the CPCB says several of the river’s stretches — in Bihar and Uttar Pradesh — are _____(88)_____ far less polluted than many rivers in Maharashtra, Assam and Gujarat. These three States account for 117 of the 351 polluted river stretches. Based on the _____(89)_____ of the National Green Tribunal, the CPCB last month _____(90)_____ the States of the extent of pollution in their rivers.