In the engineering drawing shown here, what do 1 and 2 represent?A.1 is a leader, 2 is a dimension lineB.1

In the engineering drawing shown here, what do 1 and 2 represent?A.1 is a leader, 2 is a dimension lineB.1 is a section line, 2 is a dimension lineC.1 is a center line, 2 is an object lineD.1 a section line, 2 is a center lineE.1 is a dimension line, 2 is an extension line

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