Consider the following statements 1. Currently three waterways have been declared as the national waterways of India. 2. The Sadiya-Dhubri stretch of river Brahmaputra is the longest national waterway. Which of the statements given above is/are correct ?

At the time of the CDS-I 2008 exam (February 2008), only three national waterways had been officially declared: NW-1 (1986), NW-2 (1988), and NW-3 (1993). NW-4 and NW-5 were notified later in November 2008. Thus, Statement 1 is correct. Statement 2 is incorrect because NW-1 (Ganga-Bhagirathi-Hooghly, 1620 km) is the longest national waterway, while the Sadiya-Dhubri stretch (NW-2) is only 891 km. Therefore, only Statement 1 is correct, making A the right answer.