Which is the largest among the numbers : 3 7 , 4 13 , 5

Answer: Option A

$$\text{root}3\text{of}7,\text{root}4\text{of}13,\sqrt{5}$$
Taking L.C.M. of 3, 4 and 2.

$$7^{\frac{1}{3}\times 12}$$	$$13^{\frac{1}{4}\times 12}$$	$$5^{\frac{1}{2}\times 12}$$
74	133	56
↓	↓	↓
2401	2197	15625