For years the researchers has been trying to understand (a) the problem for obesity. While it is easy

Question

The following paragraph has not been edited. There is one error in each line. Write the error and its correction as shown in the example : 

For years the researchers has been trying to understand 

(a) the problem for obesity. While it is easy

(b) to gain weight, it was nearly impossible to

(c) lose extra weight. It is therefore essential

(d) to eat healthy food and do physically exercise

Answer 1

Error                    Correction 

(a) for                    of 

(b) was                  is 

(c) extra                excess 

(d) physically        physical