A mixture consists of two metal oxides A (green) and B (white). Mixture was dissolved in 20 mL 2M NaOH solution contraining some H_(2)O_(2) to give a clear yellow solution leaving no residue. The above solution was separated into two parts. One part was acidified with acetic acid and then treated with (CH_(3)COO)_(2)Pb solution to give an yellow precipitate (C). C dissolves in dilute nitric acid forminga clear orange solution. Other part of solution was acidified with 2.0 M HCl and the 2M NH_(3) was added till the solution became alkaline and finally boiled. A white gelatinous precipitate (D) was obtained. D was then dissolved in dilute HCl and 6.0 M ammonium acetate was added. The solutions was finally treated with a few drops of alumiun reagent and made basic by adding ammonium carbonate. A red precipitate was obtained. Answer the following three questions based on the above information. Compounds A and B are respectively