In triangle ABC a straight line parallel to BC intersects AB and AC at D and E respectively. If AB = 2AD, then DE : BC is

A. 2 : 3

B. 2 : 1

C. 1 : 2

D. 1 : 3

Answer: Option C

Solution(By Examveda Team)

According to question,

Given :
AB = 2AD
$$\frac{{AB}}{{AD}} = \frac{2}{1}$$
By applying B. P. T
$$\eqalign{ & \frac{{AD}}{{AB}} = \frac{{DE}}{{BC}} = \frac{{AE}}{{AC}} \cr & \frac{{DE}}{{BC}} = \frac{1}{2} \cr & \therefore DE:BC = 1:2 \cr} $$