Identify the incorrect pair for Gymnosperms from the following:

The contrapositive of the statement 'If two numbers are not equal,then their squares are not equal' is:

$A$ torch bulb rated as $4.5\, W, 1.5\, V$ is connected as shown in the figure. The $e.m.f.$ of the cell needed to make the bulb glow at full intensity is ............. $V$.

If $I_n = \int_0^{\pi / 4} \tan^n x \, dx$, then $I_2+I_4, I_3+I_5, I_4+I_6, \ldots$ are in

The part of the castor seed from which oil is obtained is called the .....

The reactivity of borazole is higher than that of benzene because ...