The past participle of the word "begin" is

99. The past participle of the word "begin" is
The past participle of the irregular verb "begin" is "begun".
The correct option is A.
$\boxed{\text{A. begun}}$

100. The meaning of the word "bunkum" is
The word "bunkum" means nonsense or empty talk.
The correct option is A.
$\boxed{\text{A. nonsense}}$

101. Into how many regions Indian States have been classified according to Official Language Rules?
According to the Official Language Rules, 1976, Indian states and Union Territories are classified into 3 regions (Region A, Region B, and Region C) based on the usage of Hindi.
The correct option is B.
$\boxed{\text{B. 3}}$

102. According to Official Language Rules, in which of the following regions does Tamil Nadu fall?
Tamil Nadu's official language is Tamil, and it is a state where Hindi is not the official language. Therefore, it falls under Region C as per the Official Language Rules.
The correct option is C.
$\boxed{\text{C. Region C}}$