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PQR is a triangle. S and T are the midpo...

PQR is a triangle. S and T are the midpoints of the sides PQ and PR respectively. Which of the following is TRUE?
I. Triangle PST is similar to triangle PQR.
II. ST = 1/2(QR)
III. ST is parallel to QR. / ST, QR

A

Only I and II

B

Only II and III

C

Only I and III

D

All I, II and III

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