The correct option is A Brick red
The alkali earth metals and their salts impart characteristic color to an oxidizing flame. Calcium ions imparts brick red colour to the flame.
Theory:
Flame test:
The alkali earth metals and their salts impart characteristic color to an oxidizing flame
The electrons in Be and Mg are too strongly bound to get excited by flame.
Hence, these elements
do not impart any colour to the flame.