Which coal has highest quantity? |
|||||||
(a) |
Peat |
(b) |
Lignite |
(c) |
Bituminous |
(d) |
Anthracite |
Which coal has highest quantity? |
|||||||
(a) |
Peat |
(b) |
Lignite |
(c) |
Bituminous |
(d) |
Anthracite |