Which of the following are fused in somatic hybridization involving two varieties of plants?

From which plant is palm oil obtained?

What is the period of small oscillations of the block of mass $m$ if the springs are ideal and pulleys are massless?

In an atom,the order of increasing energy of electrons with quantum numbers $(i)$ $n=4, l=1$,$(ii)$ $n=4, l=0$,$(iii)$ $n=3, l=2$,and $(iv)$ $n=3, l=1$ is:

$A$ regular polygon of $n$ sides has $170$ diagonals,then $n$ is equal to

If $\theta$ is the angle between the tangents from $(-1,0)$ to the circle $x^2+y^2-5x+4y-2=0$,then $\theta$ is equal to