916: If the difference in time of the two places is 2 hours and 20 minutes, then the difference in their longitudes would be
(a) 30°
(b) 35°
(c) 40°
(d) 45°
917: How the body temperature is maintained?
(a) Due to temperature regulating mechanism located in the base of the brain
(b) Due to excessive intake of water
(c) Due to regular intake of foods
(d) Due to the constant flow of blood in the capillaries
918: The production of cultured pearls is an important cottage industry of
(a) Belgium
(b) West Indies
(c) New Zealand
(d) Japan
919: The density of sea water is highest as:
(a) Depth increases and salinity increases
(b) Depth decreases and salinity increases
(c) Depth increases and salinity decreases
(d) Depth decreases and salinity decreases
920: With reference to 'Li-Fi', recently in the news, which of the following statements is/are correct?
1. It uses light as the medium for high-speed data transmission.
2. It is a wireless technology and is several times faster than 'WiFi'.
Select the correct answer using the code given below.
(a) 1 only
(b) 2 only
(c) Both 1 and 2
(d) Neither 1 nor 2