921. The human blood is divided into__________ groups?
A. Two groups
B. Three groups
C. Four groups
D. Five groups

922. The muscles, tissues and blood all are made up of____________?
A. Carbohydrate
B. Proteins
C. Vitamins
D. Fats

923. One gram of carbohydrates give energy of the amount?
A. 2 K Calories
B. 4.1 K Calories
C. 6.3 K Calories
D. 8.0 K Calories

924. What amount of fats give energy of 9.3 K Calories?
A. 0.5 gram
B. 1.0 gram
C. 2.0 gram
D. 4.1 gram

925. Sound travels_______ in solid materials then liquid?
A. Constant
B. Slowest
C. Fastest
D. None of these

926. What Color does chlorophyll not absorb?
A. Red
B. Blue
C. Green
D. Yellow

927. One Torr is equivalent to how many mm of Mercury?
A. 1 mm
B. 10 mm
C. 100 mm
D. 0.1 mm

928. The second most abundant metal found in the earth’s crust is_____________?
A. Silicon
B. Aluminium
C. Calcium
D. Sodium

929. In BTU system, one BTU is equal to__________?
A. 2055 Joule
B. 1155 Joule
C. 2155 Joule
D. 1055 Joule

930. In which system of units, gas bills are charged?