Find the incorrect match:

The series of Gamopetalae containing $4$ cohorts and many orders is:

Match List-$I$ (Placentation type) with List-$II$ (Example) and select the correct option:
List-$I$
$A$. Marginal
$B$. Axile
$C$. Parietal
$D$. Basal
List-$II$
$I$. Mustard
$II$. Pea
$III$. Marigold
$IV$. Lemon

Describe the various parts of a flowering plant with the help of a diagram.

Thorns,spines and prickles work as . . . . . . in plants.

According to the classification system of Bentham and Hooker,what is the total number of families of seed-bearing plants (Phanerogams)?