Calcium metal with chromium(III) chloride would react. Calcium metal is more reactive than chromium metal; therefore, putting calcium metal in chromium chloride would create a reaction, where as putting chromium metal in calcium chloride would not form any reaction.
Ever heard of this thing called... RESEARCH!? You might want to try it buddy. Sayounara.
Answer: read your book
Explanation: if you read it should be in there
A, because the shape of it forms and arc much like a H2O molecule.