Explanation:

It is a rectangular pattern formed where two sets of structural controls occurs at right angles. In a trellis pattern, the river forms a net like system and the tributaries flow roughly parallel to each other. The old folded mountains of the Singhbhum (Chotanagpur Plateau) have drainage of trellis pattern. Therefore, A trellis drainage pattern develops where hard and soft rocks exist parallel to each other. Hence option 4th is correct.