Which is the highest quality of hard coal?
1). Anthracite
2). Bituminous
3). Lignite
4). Peat
5. Select the related word/letters/number from the given alternatives.ST : ZM : : KR : ?
7. Select the odd word/letters/number/number pair from the given alternatives.
8. If the radius of a circle is increased by 25%, its area increases by: