In Fig. 1, the value of the median of the data

Here we have to find the median from the given graph.

The following graph is given.

From the given graph we can easily see that the total cumulative frequency N = 80.

First we draw a line from the point $\frac{N}{2}=\frac{80}{2}=40$ on the less than ogive graph which is parallel to the $x$-axis and draw a line perpendicular to the $x$-axis from that point, which meet the $x$-axis at $x=$ 15 which is the desired median.

Hence the correct option is (d)