Answer :
The welding symbol with the numbers '2-5' repeated and an arrow refers to staggered intermittent fillet welds, indicating the weld size and pitch length. Therefore, the correct option is D.
The welding symbol you've described, with the numbers "2-5" repeated twice followed by an arrow pointing to the weld location, indicates a type of weld known as staggered intermittent fillet welds. These welds are used when welding two pieces of metal at an angle in a way that does not run continuously along the entire length of the joint but rather is spaced out at regular intervals. In this case, the '2-5' refers to the size of the fillet welds and the length of the pitch, which is the center-to-center distance between the starts or ends of each weld segment.
