STD 11 - 8. Cell the unit of life — BIOLOGY STD 11 Science — Question

$\begin{array}{|p{0.6\linewidth}|p{0.3\linewidth}|} \hline Column\,\,I  & Column\,\,II \\ \hline a.\,\,Cellular\,\,level\,\,of\,\,organisation & 1.\,\,Cnidarians \\ \hline b.\,\,Organ\,\,level\,\,of\,\,organisation  & 2.\,\,Platyhelminthes \\ \hline c.\,\,Organ\,\,system\,\,level\,\,of\,\,organisation & 3.\,\,Chordates \\ \hline d.\,\,Tissue\,\,level\,\,organisation & 4.\,\,Porifera \\ \hline \end{array}$

$a\ \ b\ \ c\ \ d$