According to IS:456, the diameter of the helices in circular a column shall be at least
[ A ] The diameter of longitudinal steel
[ B ] One-half the diameter of longitudinal steel
[ C ] One-fourth the diameter of longitudinal steel
[ D ] Three-fourth the diameter of longitudinal steel
[ A ] The diameter of longitudinal steel
[ B ] One-half the diameter of longitudinal steel
[ C ] One-fourth the diameter of longitudinal steel
[ D ] Three-fourth the diameter of longitudinal steel