| સ્તંભ-$I$ | સ્તંભ-$II$ |
| $A$. $F. W. Went$ | $1$. $Kinetin$ |
| $B$. $E. Kurosawa$ | $2$. $Gibberellic$ $acid$ |
| $C$. $Skoog$ $and$ $Miller$ | $3$. $Auxin$ |
| $D$. $Cousin$ | $4$. $Ethylene$ |
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