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Question

ABC is an isosceles triangle and a circle such that it passes through vertex C and AB acts as a tangent at D for the same circle. AC and BC intersects the circle at E and F respectively AC = BC = 4 cm and AB = 6 cm. Also, D is the mid-point of AB. What is the ratio of EC : (AE + AD)?

A
1 : 2
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B
1 : 3
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C
2 : 5
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D
None of these
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