Select correct features w.r.t. trichomes in shoot system
$(a)$ Usually unicelled
$(b)$ Branched or unbranched
$(c)$ May be secretory
$(d)$ Soft or stiff
$(e)$ Helps against transpiration

• A

  $a, b, d\;and \;e$

• B

  $All\; except \;‘c’ \;and\; ‘d’$

• C

  $All \;except \;‘a’$

• D

  $a, c \;and \;e$