Identify the correct expression for the induced velocity by a semi-infinite vortex filament at a point.(Where symbols have their usual meaning)

• A. V=\(\frac {\Gamma }{4h}\)
• B. V=\(\frac {\Gamma }{2h}\)
• C. V=\(\frac {\Gamma }{2\pi h}\)
• D. V=\(\frac {\Gamma }{4\pi h}\)