Fill in the blanks and choose the correct option.I. Stem is generally ___(i)___ when young.II. In wheat, large number of roots originate from base of stem and constitute ___(ii)___ root system.III. Cylindrical stems of ___(iii)___ contain chlorophyll and carry out photosynthesis.IV. ___(iv)___ provides rigidity to leaf blade and act as channel of transport.