Select the option which is related to the fifth

Given below are two statements, one is labelled as Assertion A and other is labelled as Reason R

Chemically most of the sand grains are

What is the function of potassium in plants?

Crown Gall disease is caused by

Field capacity is the upper limit of available soil moisture. At field capacity, how much is the suction pressure?

Which essential oil extracted from flowers is used in perfumery and is called ‘attar’?

Which is an inert growth media?

Which method is commonly used to break physical dormancy?

Mineral having maximum cation exchange capacity is

Insects, which are active during day, are known as  ____ :