Pick up the correct arrangement among the given sets below and pick up

1.	Pick up the correct arrangement among the given sets below and pick up the correct arrangement which can be used for sewage disposal.
Answer» Pick up the correct arrangement among the given sets below and pick up the correct arrangement which can be used for sewage disposal.

Pick up the correct arrangement among the given sets below and pick up the correct arrangement which can be used for sewage disposal.

Answer»

Pick up the correct arrangement among the given sets below and pick up the correct arrangement which can be used for sewage disposal.