Transportation

Let's evaluate the statements to identify the correct ones regarding transportation in India:

1. (A) Atal Tunnel passes through Pir Panjal Range. This statement is correct. The Atal Tunnel, a highway tunnel built under the Rohtang Pass in the eastern Pir Panjal Range of the Himalayas, connects Manali to Lahaul and Spiti Valley, reducing travel distance significantly.
2. (B) About 80% Indian Railway track is of metre gauge. This statement is incorrect. The majority of Indian Railways are broad gauge. Over the years, India has been converting its tracks to broad gauge from metre and narrow gauge to accommodate the increasing rail traffic and improve speed and capacity.
3. (C) The Inland Waterways Authority was set up in 1986. This statement is correct. The Inland Waterways Authority of India (IWAI) was established in October 1986 for the development and regulation of inland waterways for shipping and navigation.
4. (D) Konkan Railway connects Roha in Karnataka to Mangalore in Kerala. This statement is incorrect. The Konkan Railway actually connects Roha in Maharashtra to Mangalore in Karnataka.

Based on this evaluation, the correct statements are (A) and (C). Therefore, the correct answer is: (A) and (C) only