Select the best material, which can be used for the applications mentioned below using the following data:

Material	k(W.) m-1.K-1	ρ (kg.m-3)	Cp (J.kg-1.K-1)
I	105	2320	687
II	425	10,500	234
III	238	2700	917
IV	2320	3500	519
V	63	2250	711

Choose a material which can be used as a heat reservior (to hold that)

A. III

B. II

C. V

D. IV

Answer: Option C