From the following statements which are True:
(a) Air is necessary for combustion.
(b) Magnesium is a non-combustible metal.
(c) Carbon dioxide is an excellent fire extinguisher.
(d) Calorific value of wood is higher than that of coal.
1
(a) and (c)
2
(b) and (c)
3
(c) and (d)
4
(d) and (a)