Fillers Tips and Tricks for Government Exams

Tuesday’s multi-city police raids leading ________ the arrests of five people ________ alleged Maoist links has once again brought the debate on the concept of Urban Naxalism.
We know that the verb 'lead' is followed by the preposition 'to'. Therefore, the preposition 'to' should be filled in the blank 1.
Lead (Verb):
To culminate or result in (a particular event or consequence).
Ex. Closing the plant will lead to 300 job losses.
Now, if we observe we can find that there is no other option in which 'to' is given as a choice for the blank 1. Thus, all other options can get eliminated.
Option B is hence the correct answer.

This idea is also the explanation of his government’s policy ________ Jammu and Kashmir, as reflected _________ his own pronouncements.The noun 'policy' in general is followed by the preposition 'on'. 
Ex. The government is to introduce new liquor policy on October 1 in Vijayawada.
This confirms 'on' as the preposition for the blank 1. 
For the blank 2 the only choice that seems most appropriate among all is 'in'.
This confirms option D as the correct answer.

Pakistan Prime Minister Imran Khan’s bluster _________ Kashmir and the implied threat of a nuclear war were irresponsible and ________ the top.
'Bluster' means 'loudly boastful or threatening speech' and the only preposition that should follow it is 'on'. This eliminates options A, C and E.
For the blank 2, the preposition 'over' is the most appropriate choice as the phrase 'over the top' must have been used here in the given context of the sentence. 
Over the top (Adverbial phrase):
to an excessive or exaggerated degree.
Option B is hence the correct answer.