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In a triangle ABC, DE is parallel to BC,...

In a triangle ABC, DE is parallel to BC, AD = a, DB = a+4, AE = 2a+3, EC = 7a. What is the value of ‘a’ if a>0?
एक त्रिभुज ABC में, DE, BC के समानांतर है | AD = a, DB = a+4, AE = 2a+3, EC = 7a है | यदि a>0 है, तो a का मान क्या होगा ?

A

3

B

5

C

6

D

4

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