For $\;n \in N \;n \geq 25$ , Let A.G.H be A.M ,G.M and H.M of 25 and n . what is the least value of n such that A.G.H are all natural numbers greater than 25 .
$(a)\;49\qquad(b)\;81\qquad(c)\;169\qquad(d)\;225$