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Questions  >>  Olympiad-Math  >>  Class 4
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Q)

Which of the following is complementary angle? <br> (1) 70, 30 <br> (2) 40, 30 <br> (3) 90, 20<br> (4) 60, 70

$\begin{array}{11} (a)\; 1 \\ (b)\; 4 \\ (c)\; 3 \\ (d)\; 2 \end{array}$

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