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In `triangle ABC` ,D and E are the points on sides AC and AB, respectively, such that `angle ADE= angle B`. If AD = 7.6 cm, AE = 7.2 cm, BE = 4.2 cm and BC = 8.4 cm, then DE is equal to:
त्रिभुज ABC में, D तथा E भुजा AC और AB पर स्थित ऐसे बिंदु `angle ADE= angle B` है| यदि AD =7.6 सेमी, AE = 7.2 सेमी, BE = 4.2 सेमी तथा BC = 8.4 सेमी है, तो DE किसके बराबर है ?

A

6.3 cm

B

5.8 cm

C

7.4 cm

D

5.6 cm

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