4146: Water which contains soluble salts of calcium and magnesium is known as
(a) Heavy water
(b) Soft water
(c) Hard water
(d) Mineral water
4147: When the frequency distribution is normal
(a) median, mode and mean are all different from one another
(b) mean, mode and median are identical
(c) mean is greater than mode
(d) mean is greater than median
4148: When Leander Paes won the "mixed doubles" at the US Open in the year 2008, who of the following was his partner?
(A) Ana Ivanovic
(B) Dinara Safina
(C) Cara Black
(D) Jelena Jankovic
4149: In the above figure, ABCD is a cyclic quadrilateral, AB = BC and angle BAC = 70°, then angle ADC is
(a) 40°
(b) 80°
(c) 110°
(d) 140°
4150: Assertion (A)
Bhanu Athaiya became the first Indian to win Oscar award
Reason (R)
She received this award for her excellent portrayal of Kasturba in the film 'Gandhi'
(a) if A and R both are correct and R is the correct explanation of A
(b) if A and R both are correct but R is not the correct explanation of A
(c) if A is incorrect but R is correct
(d) if A is correct but R is incorrect