When copper is heated with conc. \\\\(\\displaystyle HNO_3\\\\) it produces cupric nitrate \\\\(\\displaystyle Cu(NO_{3})_{2}\\\\) and nitrogen dioxide \\\\(\\displaystyle NO_{2}\\\\). \\\\(\\displaystyle Cu + 4 HNO_3 \\rightarrow Cu(NO_{3})_{2} + 2NO_{2} + 2H_2O\\\\)Hence, option \\\\(A\\\\) is correct.