This question asks which of four well-known Indian wetlands is not on the official Ramsar list, so each site's actual Ramsar status needs to be checked rather than assumed from fame alone.
Three of the four sites, Asan, Kabartal and Lonar, are confirmed Ramsar wetlands, while Dal Lake, despite its fame, has not received that designation.
So the correct answer is Dal Lake, Jammu and Kashmir.
This is a direct recall of the fixed calendar date for World Wetlands Day, so matching the day to the actual anniversary it marks settles the answer.
Only one date in the list ties back to the actual 1971 signing of the Ramsar Convention, which is what World Wetlands Day commemorates every year.
So the correct answer is February 2.
Each year's World Wetlands Day carries a different official theme, so this question is about correctly matching the theme to 2021 specifically rather than to any other year.
Three of the four themes listed are genuine World Wetlands Day themes, just from other years; Wetlands and Water is the one that was specifically used in 2021.
So the correct answer is Wetlands and Water.
This question is about scale, which mangrove forest in the list is the world's largest, so comparing the size and reach of each option is the way to settle it.
All four options are genuine mangrove ecosystems, but only the Sundarbans reach the scale that makes them the largest mangrove forest in the world; the other three are comparatively much smaller.
So the correct answer is Sundarban Mangrove.
All four options use similar-sounding words, wetland, wildlife, coastal, conservation, so this question really tests whether the exact name of the centre announced on World Wetlands Day 2021 is remembered precisely.
The other three options each swap in a plausible-sounding but incorrect word in place of either wetland or conservation; only the fourth option preserves both terms exactly as announced.
So the correct answer is Centre for Wetland Conservation and Management.