Q. Length of an outstanding leg of a vertical stiffener, may be taken equal to

• (A) 1/10th of clear depth of the girder plus 15 mm
• (B) 1/20th of clear depth of the girder plus 20 mm
• (C) 1/25th of clear depth of the girder plus 25 mm
• (D) 1/30th of clear depth of the girder plus 50 mm