21. Which of the following mangrove species is not found in India?
a) Avicennia marina
b) Rhizophora apiculata
c) Nypa fruticans
d) Sonneratia caseolaris
22. Which Indian state has the highest density of mangrove cover?
a) West Bengal
b) Gujarat
c) Odisha
d) Tamil Nadu
23. What is the main economic activity associated with the mangroves of the Andaman and Nicobar Islands?
a) Fishing
b) Tourism
c) Agriculture
d) Mining
24. Which Indian mangrove forest is known for its crab farming and honey production?
a) Bhitarkanika Mangroves
b) Sundarbans Mangroves
c) Pichavaram Mangroves
d) Vedaranyam Mangroves
25. Which of the following is the largest contiguous mangrove forest in India?
a) Sundarbans Mangroves
b) Bhitarkanika Mangroves
c) Pichavaram Mangroves
d) Vedaranyam Mangroves
