" Shortest distance between the lines "(x-1)/(1)=(y-1)/(1)=(z-1)/(1)" and "(x-2)/(1)=(y-3)/(1)=(z-4)/(1)" is equal to "

Shortest distance between the lines (x-1)/1=(y-1)/1=(z-1)/1a n d(x-2)/1=(y-3)/1=(z-4)/1 is equal to

The shortest distance between the lines (x-2)/(3)=(y+3)/(4)=(z-1)/(5) and (x-5)/(1)=(y-1)/(2)=(z-6)/(3) , is

The shortest distance between the lines (x)/(m_(1))=(y)/(1)=(z-a)/(0) and (x)/(m_(2))=(y)/(1)=(z+a)/(0)

Shortest distance between the lines (x-1)/1=(y-1)/1=(z-1)/1a n d(x-2)/1=(y-3)/1=(z-4)/1 is equal to a. sqrt(14) b. sqrt(7) c. sqrt(2) d. none of these

Shortest distance between the lines (x-1)/1=(y-1)/1=(z-1)/1a n d(x-2)/1=(y-3)/1=(z-4)/1 is equal to a. sqrt(14) b. sqrt(7) c. sqrt(2) d. none of these

Shortest distance between the lines (x-1)/1=(y-1)/1=(z-1)/1a n d(x-2)/1=(y-3)/1=(z-4)/1 is equal to a. sqrt(14) b. sqrt(7) c. sqrt(2) d. none of these

Equation of the line of the shortest distance between the lines (x)/(1)=(y)/(-1)=(z)/(1) and (x-1)/(0)=(y+1)/(-2)=(z)/(1) is: