Observe the following Columns.
 

S.No.	Column-I	S.No.	Column-II
A)	In a triangle ABC, $\text{ if }{\mathrm{a}}^4-2\left({\mathrm{b}}^2+{\mathrm{c}}^2\right){\mathrm{a}}^2+{\mathrm{b}}^4+{\mathrm{b}}^2{\mathrm{c}}^2+{\mathrm{c}}^4=0\text{, then }\mathrm{\angle }\mathrm{A}\text{ is }$	p)	30°
B)	In a triangle ABC, $\text{ if }{\mathrm{a}}^4+{\mathrm{b}}^4+{\mathrm{c}}^4={\mathrm{a}}^2{\mathrm{b}}^2+2{\mathrm{b}}^2{\mathrm{c}}^2+2{\mathrm{c}}^2{\mathrm{a}}^2\text{, then }\mathrm{\angle }\mathrm{C}\text{ is }$	q)	60°
C)	In a triangle ABC, ${\mathrm{a}}^4+{\mathrm{b}}^4+{\mathrm{c}}^4+2{\mathrm{a}}^2{\mathrm{c}}^2=2{\mathrm{a}}^2{\mathrm{b}}^2+2{\mathrm{b}}^2{\mathrm{c}}^2,\text{ then }\mathrm{\angle }\mathrm{B}\text{ is }$	r)	90°
D)	In a $\mathrm{△}\mathrm{ABC}\text{, if }{\mathrm{a}}^2+{\mathrm{b}}^2+{\mathrm{c}}^2=\sqrt{2}\mathrm{b}(\mathrm{c}+\mathrm{a})\text{, then }\mathrm{\angle }\mathrm{B}\text{ is }$	s)	120°
		t)	150°