The sandy channel called “outer channel” is the characteristic of:

Correct option is B

Correct Answer: (b) Chilika lake
Explanation:
→ Chilka Lake features distinct coastal geomorphology including a sandy outer channel (entrance bar and sandbars) that regulates water exchange with the sea — a defining characteristic of its lagoon system.
Information Booster:
→ The outer channel controls salinity intrusion, fish migration, and hydrodynamics; management of the inlet has been critical for Chilka’s ecology.
Additional Information (Other Options):
(a) Pulicat has different channel/lagoon features; (c) Hooghly is a major estuarine river; (d) Adyar is a small urban estuary.