Which transformations will produce similar, but not congruent, figures?

Triangle PQR is rotated 180° counterclockwise and then translated 11 units left to form triangle P"Q"R" .

Triangle PQR is rotated 90° clockwise and then reflected across the y-axis to form triangle P"Q"R" .

Triangle PQR is reflected across the x-axis and then rotated 90° clockwise to form triangle P"Q"R" .

Triangle PQR is reflected across the y-axis and then dilated by a scale factor of 6 to form triangle P"Q"R" .

Question

Which transformations will produce similar, but not congruent, figures?

​ Triangle PQR ​ is rotated 180° counterclockwise and then translated 11 units left to form ​ triangle P"Q"R" ​ .

​ Triangle PQR ​ is rotated 90° clockwise and then reflected across the y-axis to form ​ triangle P"Q"R" ​ .

Triangle PQR is reflected across the x-axis and then rotated 90° clockwise to form triangle P"Q"R" .

​ Triangle PQR ​ is reflected across the y-axis and then dilated by a scale factor of 6 to form ​ triangle P"Q"R" ​ .