Option (a) – This statement is correct as a lighted electric bulb is very hot and on touching it can lead to severe burn.

Option (b) – This is also a correct statement as it can lead to a serious mishap.

Option (c) – This is also a correct statement as fuse are made of a particular type of wire.

Option (d) – This is the wrong statement as if we don’t turn the switch to ON position then it is no use to us.