3876: Which one of the following is not a lagoon?

(a) Ashtamudi lake
(b) Chilka lake
(c) Periyar lake
(d) Pulicat lake
3877: Which one of the following is a non-metallic mineral?

(a) Manganese

(b) Magnesium

(c) Gypsum

(d) Bauxite
3878: Variable reserve rates and Open Market Operations are instruments of

(a) Fiscal Policy

(b) Monetary Policy

(c) Budgetary Policy

(d) Trade Policy
3879: The 1929 Session of Indian National Congress is of significance in the history of the Freedom Movement because the

(a) Attainment of Self-Government was declared as the objective of the Congress
(b) Attainment of Poorna Swaraj was adopted as the goal of the Congress
(c) Non-Cooperation Movement was launched
(d) Decision to participate in the Round Table Conference in London was taken
3880: Which one of the following is the correct sequence of ecosystems in the order of decreasing productivity?

(a) Oceans, lakes, grasslands, mangroves

(b) Mangroves, oceans, grasslands, lakes

(c) Mangroves, grasslands, lakes, oceans

(d) Oceans, mangroves, lakes, grasslands