Choose the correct statement(s) regarding Magnesium :

The correct options are
A Magnesium forms alloys with aluminium, zinc, manganese and tin.
B Mg-Al alloys being light in mass are used in air-craft construction.

C Mg is used in flash powders and bulbs, incendiary bombs and signals.
D Milk of magnesia is used as antacid in medicine.
Uses of magnesium :
1. Magnesium forms alloys with aluminium, zinc, manganese and tin.
2. Mg-Al alloys being light in mass are used in air-craft construction.
3. Milk of magnesia is used as antacid in medicine.
4. Mg is used in flash powders and bulbs, incendiary bombs and signals.
5. $MgC{O}_3$ is used as an ingredient in toothpaste.