B = {2, 4, 6, 8)
E = {a, b, c, d, e}
A = {a,b,c}
D - {a, e, i, o, u}
State the possible universal set for each of the following sets:
X = { Narayani, Trisuli, Kaligandaki }
Y = {Sagarmatha, Kanchanjangha, Machhapuchhre}
Z = {Chitwan, Makawannpur, Bara}
W = {Sunday, Thursday, Saturday }