Necrosis is the term used for the

All of the following are elements whose deficiency symptoms first appear in the older tissues,except:

Which mineral deficiencies appear in plants due to manganese toxicity?

In plants,a common symptom caused by the deficiency of $P, K, Ca$ and $Mg$ is the

Deficiency symptoms of mineral elements appear first in young leaves. - $P$
Deficiency symptoms of mineral elements appear first in senescent (older) leaves. - $Q$
$P$ and $Q$ are respectively:

Match the mineral deficiency disorders given in Column $I$ with their symptoms given in Column $II$.

Column $I$ (Disorder)	Column $II$ (Description)
$i$. Chlorosis	$a$. Localised death of tissues in leaves
$ii$. Necrosis	$b$. Premature fall of flowers,fruits and leaves
$iii$. Mottling	$c$. Yellowing of leaves due to absence of chlorophyll
$iv$. Abscission	$d$. Appearance of green and non-green patches on leaves

Choose the correct option from below.