Match List I with List II correctly and select your answer using the codes given below :

List I	List II
(a) Simhavishnu	1. Velvikudi Cheppedu
(b) Neduchadayan Paranthagan	2. Udayendra Pattayam
(c) Nandi Varman II	3. Udaya Sundara Mangala  Pattayam
(d) Narasimhavarman	4. Kasakudi Pattayam

'Aattanathi' is

Match List I with List II correctly and select your answer using the codes given below :

When a glass rod is rubbed with a piece of silk cloth,

What is the diameter of the optical fibres used to carry voice, video and data signals in telecommunication networks

The book which speaks about 'ancient musical instrument' is