Match the following functions in plants and the essential elements related to it.

Column I		Column II
A	Regulates opening and closing of stomata	i	Magnesium
B	Helps in maintaining ribosome structure	ii	Boron
C	Component of nitrate reductase	iii	Potassium
D	Required for uptake and utilisation of Calcium	iv	Molybdenum

• A

  A - iii, B - i, C - iv, D - ii

• B

  A - ii, B - i, C - iv, D - iii

• C

  A - iii, B - iv, C - i, D - ii

• D

  A - ii, B - iii, C - iv, D - i