A magnetic needle is suspended first at the earth's north magnetic pole and then at a point on the magnetic equator. The respective angles between the needle and the horizontal are

A. 0^o and 0^o
B. 60^o and 60^o
C. 90^o and 90^o
D. 90^o and 0^o  
E. 0^o and 90^o

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Correct Answer: D