भारतात अंतर्गत मत्स्योत्पादनाची कोणती साधने आहेत ?
अ. नद्या
ब. कॅनॉल
क. मोठी धरणे
ड. विहिरी
योग्य पर्याय निवडा :

The correct answer is Option C (a, b and c).

Key Points:
• Fisheries in India are broadly divided into Marine Fisheries (coastal and offshore) and Inland / Internal Fisheries (freshwater and brackish water bodies).
• Internal / Inland Fishery Resources:
• Statement (a) Rivers: Major river basins (Ganga, Brahmaputra, Godavari, Krishna) and their tributaries form sprawling riverine capture fisheries.
• Statement (b) Canals: Irrigation network canals stretching over thousands of kilometers are systematically leased out for capture and culture fisheries.
• Statement (c) Big Dams / Reservoirs: Massive man-made impoundments and reservoirs (such as Hirakud, Nagarjuna Sagar, Koyna) provide extensive water spread areas for inland fish culture and cage farming.
• Wells (विहिरी) are constructed exclusively for domestic extraction or agricultural lift irrigation and are not classified as productive fishery resources.
• Therefore, the recognized internal fishery sources are a, b, and c (Option 3).
• Key Takeaway: Internal/inland fisheries in India thrive across rivers, canals, and large dam reservoirs, but exclude agricultural wells.