The scala media is rich in K + while the scale vestibuli and tympani are rich in Na+.

a. True

b. False

The given statement is True.

Explanation:

Scala media has endolymph as its constituent and endolymph is rich in Potassium ions (K+)

whereas

Scala tympani and scala vestibuli has in its composition Perilymph and Perilymph has sodium ions as their major constituent ions.

Therefore, scala media is Potassium ion rich while scala tympani and vestibuli are sodium ion rich.