$\text{ Torque croated due to weight of streat light remains }$

$\text{ same in all the three cases. }9t\text{ is balanced by }$

$\text{ torque created by tension in the string. So if }\gamma$

$\text{ be the torque created by weight of lamp and }T\text{ ’ }$

$\text{ be tension in the string and ’ }d\text{ ’ be perpendicular }$

$\text{ distance of cable from the axis thou, }$ 

$\tau =T\cdot d$

$\text{ Tension will be least for laxgest’d’. This is }$

$\text{ in pattern }A\text{ is more sturdy. }$