NL ∈ PSPACE ∈ EXPSPACEThe given relation involves which of the following theorems?a) Space hierarchy theoremb) Savitch’s theoremc) Both (

• A. Space hierarchy theoremb) Savitch’s theoremc) Both (a) and (
• B. Savitch’s theorem
• C. Both (a) and (b)
• D. None of the mentioned