If \[\frac{2{{z}_{1}}}{3{{z}_{2}}}\] is a purely imaginary number, then \[\left| \frac{{{z}_{1}}-{{z}_{2}}}{{{z}_{1}}+{{z}_{2}}} \right|\] = [MP PET 1993]

If \[\frac{2{{z}_{1}}}{3{{z}_{2}}}\] is a purely imaginary number, the

1.	If \[\frac{2{{z}_{1}}}{3{{z}_{2}}}\] is a purely imaginary number, then \[\left\| \frac{{{z}_{1}}-{{z}_{2}}}{{{z}_{1}}+{{z}_{2}}} \right\|\] = [MP PET 1993]
A.	3/2
B.	1
C.	2/3
D.	4/9
Answer» B. 1