Questions

Ans. E.
i. is incorrect because of the incorrect use of open”.
ii. is incorrect because of the incorrect use of “opened” hopefully represents future while opened represents past. This makes the sentence structurally incorrect.
C is correct because of the correct use of “would open” and delivers correct meaning to the sentence. 'would' is used to refer to the possibility in the future which is supported by the use of the word 'hopefully'.
iii. is incorrect because of the incorrect use of “is opening”.

The  plant  growth  regulators  are small,  simple  molecules  of  diversechemical composition. They can be in   form   of   indole   compounds, adenine   derivatives,   carotenoids derivatives,terpenes  or  gases  like ethyleneetc.The   plant   growth regulators  are  bifurcated  into  two groups according to their functions in  a  living  plant  body.First  group of   plant   growth   regulators   are found   in   growth   activities,   for instance,  cell  division,  flowering, fruiting  and  seed  formation.The second   group   of   Plant   growth regulators   are   involved   in   plant responses  to  wounds  and  stresses of biotic and abiotic origin.

World Soil Day 2017 is celebrated on 5 December under the theme "Caring for the Planet starts from the Ground," with activities aiming to communicate messages on the importance of soil quality for food security, healthy ecosystems and human well-being.Soils not only produce 95% of the food we consume, they also have a huge potential for taking carbon from the atmosphere and offsetting the greenhouse gas emissions. Keeping the soil healthy can bring a multitude of gains, from food security to sustainable livelihoods and climate benefits.