Questions

The given sentence is in simple present tense and states a general fact, hence the latter half of the sentence with the blank will also be in the simple present tense. Since the subject in the latter part of the sentence is singular .i.e. 'the number', the verb will be followed accordingly. Hence, option 4 is the correct answer.

Fragmentation occurs in a dynamic memory allocation system when many of the free blocks are too small to satisfy any request.

Soviet Union

Jim Laker was the first player to take all 10 wickets in a Test match innings. Ten for 53 in the Australians 2nd innings of the 4th Ashes Test at Old Trafford in 1956.

The only other bowler to achieve the feat is India's Anil Kumble, who took ten for 74 at Delhi's Feroz Shah Kotla against Pakistan in 1999.

Our Ex. Prime Minister Rajiv Gandhi was Pilot by profession before he entered politics.