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# Two filaments of spirogyra aplanospora are observed. One of the filaments has 150 cells another contains 225 cells. If all the cells in both the filaments are involved in asexual reproduction, what is the ratio of new filaments developed from them?

$\begin {array} {1 1} (1)\;1 : 1 & \quad (2)\;3 : 5 \\ (3)\;1 : 2 & \quad (4)\;2 : 3 \end {array}$

(4) 2: 3