2236: The blood pressure values of four persons are given below :
1. Mrs. X : 90/60
2. Mr. X : 160/120
3. Mr. Y : 120/80
4. Mrs. Y : 140/100
Who among the following has normal blood pressure?
(a) Mrs. X
(b) Mr. X
(c) Mrs. Y
(d) Mr. Y
2237: Man passed from the food gathering stage to the food producing stage in the:
(a) Neolithic Age
(b) Mesolithic Age
(c) Chalcolithic Age
(d) Palaeolithic Age
2238: Which of the following statements is true?
(a) Both salinity and density of sea increase with depth
(b) Both salinity and density of sea decrease with depth
(c) Salinity increases but density of sea decreases with depth
(d) Salinity decreases but density of sea increases with depth
2239: Which one of the following types of coal contains a higher percentage of carbon than the rest ?
(a) Bituminous coal
(b) Lignite
(c) Peat
(d) Anthracite
2240: In which of the following States is lion-tailed macaque found in its natural habitat?
1. Tamil Nadu
2. Kerala
3. Karnataka
4. Andhra Pradesh
Select the correct answer using the codes given below.
(a) 2 only
(b) 1, 2 and 3 only
(c) 1, 3 and 4 only
(d) 1, 2, 3 and 4