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Which of the following statements is CORRECT?

A)  In an isosceles triangle, the angles opposite to equal sides are equal.

B)  The bisector of the vertical angle of an isosceles triangle bisects the base at right angles.                    

C)  If the hypotenuse and an acute angle of one right angled triangle is equal to the hypotenuse and the corresponding acute angle of another triangle, then the triangles are congruent.        

D)  All of these