Most primitive type of stele found in pteridophytes is: A) Dicytostele B) Solenostele C) Siphonostele D) Protostele Related MCQs: Pteridophytes are also called: Which are the most primitive group of algae? Marlowe’s primitive tragedy was ……? Ali can type at a speed of 25 words per minute. How many words he can type in one hour?