If $n$ is the number of irrational terms in the expansion of $\left( 3 ^ { 1 / 4 } + 5 ^ { 1 / 8 } \right) ^ { 60 }$, then $( n - 1 )$ is divisible by : (1) 26 (2) 30 (3) 8 (4) 7
If $n$ is the number of irrational terms in the expansion of $\left( 3 ^ { 1 / 4 } + 5 ^ { 1 / 8 } \right) ^ { 60 }$, then $( n - 1 )$ is divisible by :\\
(1) 26\\
(2) 30\\
(3) 8\\
(4) 7