Which of the following does not produce bark?

مندرجہ ذیل میں سے کون چھال پیدا نہیں کرتا ہے؟

Prunus

Guava

Date palm

None of these

Date palm (Phoenix dactylifera) does not produce true bark because it is a monocot and lacks secondary growth.

Prunus, Guava, and Solanum are dicots that develop bark through secondary growth.