Question

Girth of stem increases due to 1) apical meristem 2) lateral meristem 3) intercalary meristem 4) vertical meristem

Answer 1

The girth of the stem is increased due to 2)Lateral meristem.
Apical is responsible for the height of the plant.
Intercalary is responsible for the growth of nodes and internodes.
I hope this was helpful :)

Answer 2

it is lateral meristem which helps to increase the girth of stem