Rearrange the following six sentences (A), (B), (C), (D), (E) and (F) in the proper sequence to form a meaningful paragraph; then answer the questions given below them.
(A) To address these issues Indian corporate are increasingly turning eco-friendly
(B) At present however there are only a dozen green buildings in the private sector.
(C) However though an eco-friendly building may cost more upfront however it is cost effective because of lower operating costs in long run.
(D) Today there is growing concern about global warming, energy and water crises.
(E) The reason is the construction cost of an eco-friendly building is 15% to 20% more than putting up a conventional building.
(F) Planting trees, using energy saving lighting systems and constructing eco-friendly green buildings are some of the measure they are taking.
Choose the part of the sentence that contains a grammatical error. Choose option 5 if the sentence is grammatically correct as it is. Ignore errors in punctuation.