A pole of length 7 m is fixed vertically on the top of a tower. The angle of elevation of the top of the pole observed from a point on the ground is 60° and the angle of depression of the same point on the ground from the top of the tower is 45° The height (in m) of the tower is:

• A. 7(2√3 – 1)
• B. 7√3/2+ 2
• C. 7√3
• D. 7(√3 + 1)/2