Death sentence may not be passed by:

Correct option is B

According to Section 22 of BNSS, 1973, a Sessions Judge or an Additional Sessions Judge has the authority to pass a death sentence. However, an Assistant Sessions Judge does not have the jurisdiction to impose the death penalty as their sentencing powers are limited to imprisonment up to ten years under Section 22 of BNSS

Additionally, High Courts also possess the power to confirm or impose the death penalty during the process of appeal or revision. Hence, the correct answer is Assistant Sessions Judge as they are not authorized to pass a death sentence.