Mohan, Jeevan and Rohan walk around a circular track. They take\[\frac{\text{1}}{\text{3}}\text{h}\], \[\frac{\text{2}}{\text{5}}\text{h}\]and \[\frac{5}{12}\text{h}\]to complete a round respectively. Find the total time taken by the three persons to complete a round.

• A.  \[\text{1}\frac{\text{7}}{\text{10}}\text{h}\]                       
• B.  \[\text{1}\frac{3}{20}\text{h}\]        
• C.       \[\text{1}\frac{2}{15}\text{h}\]        
• D.       \[\text{1}\frac{\text{1}}{\text{13}}\text{h}\]