Match the List-I (Management Thinkers) with List-II (Contributions) and choose the correct option.
\[ \begin{array}{|c|l|c|l|} \hline \text{List-I (Management Thinkers)} & & \text{List-II (Contributions)} & \\ \hline (a) & \text{F.W. Taylor} & (i) & \text{Administrative principles of management} \\ \hline (b) & \text{Henri Fayol} & (ii) & \text{Human relations approach} \\ \hline (c) & \text{Elton Mayo} & (iii) & \text{Scientific management principles} \\ \hline (d) & \text{Peter F. Drucker} & (iv) & \text{Management by objectives} \\ \hline \end{array} \]
Recently, India has donated 1 million to the United Nations to support promotion of which of the following Indian languages?
Which of the following pairs is/are correctly matched? 
Arrange the following events in correct chronological order:
(i) Champaran Satyagraha
(ii) Khilafat Movement
(iii) Civil Disobedience Movement
(iv) Quit India Movement
A sum of Rs. 800 amounts to Rs. 920 in 3 years at simple interest. What would be the amount, if the interest rate is increased by 3%?
In what ratio must water be mixed with milk to gain 20% by selling the mixture at cost price?