The narrow layer of thin-walled cells found in dicots (between the phloem and xylem) is known as ..........

The tissue made up of thin-walled rectangular cells responsible for the secondary growth is

The woody axis of flowering plants is produced by

The cork cambium,cork,and secondary cortex are collectively called:

$A$. Heartwood is durable,dark,and central in position.
$B$. Tyloses are balloon-like structures of xylem parenchyma in vessel lumen.
$C$. Late wood is formed during spring season.

In dicot stem,secondary xylem lies towards the ...$A$... and secondary phloem lies towards the ...$B$.... Choose the correct combination of options for $A$ and $B$.