Aurora Borealis, the so called northern lights are due to

Consider the following stateinents :
(i) The closure of Atrio ventricular valves result in "lubb" sound.
(ii) The closure of semilunar valves result in "dubb" sound. Choose the right answer.

Name the vitamin and mineral necessary for blood clotting

Name the gas which is evolved during photosynthesis

Match the following :
(a) August Offer 1. 1944
(b) C.R. Formula 2. 1945
(c) Wavell Plan 3. 1946
(d) Interim Government 4. 1940

Match the following:
(a) Nehru Report 1940
(b) Second Round Table Conference 1928
(c) Individual Satyagraha 1946
(d) Lord Attlees Announcement 1931

Consider the following statements :
Assertion (A) : V.O. Chidambaram Pillai established Swadeshi Steam Navigation Company in 1910.
Reason (R) : V.O. Chidambaran Pillai is called as Kappalottiya Tamilan.

Point out the wrong statement/statements in the following:
(i) V.O.C. born at Ettayapuram.
(ii) Annie Besant started Theosophical Society.
(iii) Bharathiyar died at Pondicherry.
(iv) E.V.R. started Self-Respect Movement.

Which of the following is incorrectly matched?

Consider the following and select the false ones:
I. Indias food problem is concerned with demand and supply of food grains.
II. Indias food problem is concerned with quality, distribution and economic reasons.
III. Indias food problem is concerned with procurement of food grains.
IV. Indias food problem is concerned with improper distribution.