Observe the figure given below and choose correct option :

(Given : b = birth rate , d = death rate )

b=d.

The correct answer is Option (3)- b=d.

The figure given represents stable population pyramid.

Stable age pyramid is also known as ‘bell shaped’ pyramid.  In this type of pyramid the pre and post reproductive population is the same.

The population remains unchanging, neither declining nor growing.

Hence, b=d.