number of Upaniṣads are considered to be the principal Upaniṣadsa.1b.100c.1000d.10

Break Down the Problem

1. Identify the number of Upaniṣads considered principal.
2. Analyze the options given.

Relevant Concepts

The Upaniṣads are ancient Indian texts that form the philosophical basis of Hinduism. There are traditionally recognized principal Upaniṣads.

Analysis and Detail

The principal Upaniṣads are generally recognized as a specific set that holds significant philosophical importance in Vedanta. The commonly accepted number is often cited as 10.

Verify and Summarize

Upon reviewing, the principal Upaniṣads are indeed regarded as a selection of 10 key texts within the broader corpus of Upaniṣads.

Final Answer

The number of Upaniṣads considered to be the principal Upaniṣads is 10 (d).