A rigid body rotates about an axis through the origin with an angular velocity 103 rad/s. If ω points in the direction of i^+j^+k^ , then the equation to the locus of the points having tangential speed 20 m/s is
a. x2+y2+z2−xy−yz−zx−1=0
b. x2+y2+z2−2xy−2yz−2zx−1=0
c. x2+y2+z2−xy−yz−zx−2=0
d. x2+y2+z2−2xy−2yz−2zx−2=0