An X-Y flip-flop, whose characteristic table is given below is to be implemented using J-K flip-flop. This can be done making

X	Y	Qn+1
0	0	1
0	1	Qn
1	0	$${\overline {\text{Q}} _{\text{n}}}$$
1	1	0

A. $${\text{J}} = {\text{X, K}} = \overline {\text{Y}} $$

B. $${\text{J}} = \overline {\text{X}} {\text{, K}} = {\text{Y}}$$

C. $${\text{J}} = {\text{Y, K}} = \overline {\text{X}} $$

D. $${\text{J}} = \overline {\text{Y}} {\text{, K}} = {\text{X}}$$

Answer: Option D