586: A married couple adopted a male child. A few years later twin boys were born to them. The blood group of the couple is 'AB' positive and 'O' negative. The blood group of the three sons is A positive, B positive, and 'O' positive. The blood group of the adopted son is
(a) A positive
(b) B positive
(c) O positive
(d) Cannot be determined
587: A man takes 6 km distance to go round a rectangular area. If the area of the rectangle is 2 km, find the difference between length and breadth
(a) 1 km
(b) 0.5 km
(c) 2 km
(d) 0.75 km
588: Which of the following is/are the indicator/indicators used by IFPRI to compute the Global Hunger Index Report?
1. Undernourishment
2. Child stunting
3. Child mortality
Select the correct answer using the code given below.
(a) 1 only
(b) 2 and 3 only
(c) 1 , 2 and 3
(d) 1 and 3 only
589: Consider the following organisms:
1. Agaricus
2. Nostoc
3. spirogyra
Which of the above is/are used as biofertilizer/biofertilizers?
(a) 1 and 2
(b) 2 only
(c) 2 and 3
(d) 3 only
590: Assertion (A) :
The British sovereignty continued to exist in free India.
Reason (R) :
The British sovereign appointed the last Governor-General of free India.
In the context of the above two statements, which one of the following is correct ?
(a) Both A and R are true and R is the correct explanation of A
(b) Both A and R are true but R is not a correct explanation of A
(c) A is true but R is false
(d) A is false but R is true