Could someone ? match the symbols used in electric circuit diagrams to their functions.

1.   B

2.  C

3.  D

4.  A

Hope this helped

The picture with the related symbols can be seen as follows

browsing like internet search? don't look at anything stupid. or set up restrictions on ur device's search engine. and if something suspicious comes up don't be dumb and click on it. i hope that's what ur question meant.