Select the phrase/connector from the given three options which can be used to form a single sentence from the two sentences given below, implying the same as expressed in the statement sentence.
Water power is derived from the energy of fast-running water. It may be harnessed for useful purposes.
1. But may be
2. Which may be
3. Can may be
1
Only 1
2
Only 2
3
Only 3
4
Both 1 and 2
5
Both 1 and 3